refactor: Reorganize source into subsystem folders/namespaces

[Copilot]

Mirrors the folder/namespace subsystem structure recently adopted by ReqStream. Each subsystem gets its own subdirectory and child namespace; the test project mirrors the same layout.

Source restructure

File	Folder	Namespace
Program.cs	(root)	DemaConsulting.VersionMark
Context.cs	Cli/	DemaConsulting.VersionMark.Cli
VersionMarkConfig.cs	Configuration/	DemaConsulting.VersionMark.Configuration
VersionInfo.cs	Capture/	DemaConsulting.VersionMark.Capture
MarkdownFormatter.cs	Publishing/	DemaConsulting.VersionMark.Publishing
Lint.cs	Linting/	DemaConsulting.VersionMark.Linting
Validation.cs + PathHelpers.cs	SelfTest/	DemaConsulting.VersionMark.SelfTest

Folder names Linting and SelfTest are deliberately chosen to avoid Lint.Lint and Validation.Validation namespace/class collisions.

Test restructure

Test files moved to matching subsystem subfolders (Cli/, Configuration/, Capture/, Publishing/, Linting/, SelfTest/) with namespaces updated accordingly. Root-level files (Runner.cs, IntegrationTests.cs, ProgramTests.cs, AssemblyInfo.cs) remain at root.

Documentation and review-set alignment

• Design docs renamed to match subsystem folder names: subsystem-command-line.md → subsystem-cli.md, subsystem-publish.md → subsystem-publishing.md, subsystem-lint.md → subsystem-linting.md, subsystem-validation.md → subsystem-selftest.md
• ReqStream yaml files renamed accordingly: subsystem-command-line.yaml → subsystem-cli.yaml, etc.
• Review-set IDs and titles updated in .reviewmark.yaml: VersionMark-CommandLine-Subsystem → VersionMark-Cli-Subsystem, VersionMark-Lint-Subsystem → VersionMark-Linting-Subsystem, VersionMark-Publish-Subsystem → VersionMark-Publishing-Subsystem, VersionMark-Validation-Subsystem → VersionMark-SelfTest-Subsystem
• VersionMark-Design and VersionMark-AllRequirements review sets switched to glob patterns (docs/design/**/*.md and docs/reqstream/**/*.yaml) so future files are automatically included
• docs/design/introduction.md gains a Folder Layout section with the annotated source tree, and all subsystem names updated throughout design docs and system.md
• All cross-references updated in definition.yaml, requirements.yaml, and .reviewmark.yaml

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Code quality improvement

Pre-Submission Checklist

Before submitting this pull request, ensure you have completed the following:

Build and Test

• Code builds successfully: dotnet build --configuration Release
• All unit tests pass: dotnet test --configuration Release
• Self-validation tests pass:
  dotnet run --project src/DemaConsulting.VersionMark --configuration Release --framework net10.0
--no-build -- --validate
• Code produces zero warnings

Code Quality

• Code formatting is correct: dotnet format --verify-no-changes
• New code has appropriate XML documentation comments
• Static analyzer warnings have been addressed

Quality Checks

Please run the following checks before submitting:

• Spell checker passes: cspell "**/*.{md,cs}"
• Markdown linter passes: markdownlint "**/*.md"
• YAML linter passes: yamllint .

Testing

• Added unit tests for new functionality
• Updated existing tests if behavior changed
• All tests follow the AAA (Arrange, Act, Assert) pattern
• Test coverage is maintained or improved

Documentation

• Updated README.md (if applicable)
• Updated ARCHITECTURE.md (if applicable)
• Added code examples for new features (if applicable)
• Updated requirements.yaml (if applicable)

Additional Notes

Pure structural refactor — no logic, API, or behavior changes. All 141 tests pass unchanged.

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[Malcolmnixon]

@copilot You've renamed subsystems, but you didn't rename the design documentation or the review-set names.

[Copilot]

@copilot You've renamed subsystems, but you didn't rename the design documentation or the review-set names.

Done in commits 0b65a94 and 3e2e1d4:

• Renamed design docs: subsystem-command-line.md → subsystem-cli.md, subsystem-publish.md → subsystem-publishing.md, subsystem-lint.md → subsystem-linting.md, subsystem-validation.md → subsystem-selftest.md
• Renamed reqstream yamls to match
• Updated review-set IDs and titles: VersionMark-CommandLine-Subsystem → VersionMark-Cli-Subsystem, etc.
• Updated all references in definition.yaml, requirements.yaml, and .reviewmark.yaml
• Updated subsystem headings inside the docs themselves
• Switched VersionMark-Design and VersionMark-AllRequirements to use glob patterns (docs/design/**/*.md and docs/reqstream/**/*.yaml) so future design/requirements files are automatically included

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[Malcolmnixon]

@copilot I notice the Validation class doesn't have an associated ValidationTests.cs - software units should have unit-tests.

[Copilot]

Pull request overview

Refactors VersionMark to mirror a subsystem-aligned folder/namespace layout (matching the structure adopted by ReqStream), while updating tests and the documentation/review configuration to follow the new organization.

Changes:

• Reorganized src/ into subsystem folders with matching DemaConsulting.VersionMark.<Subsystem> namespaces.
• Reorganized test/ files into matching subsystem folders/namespaces and updated references/usings.
• Renamed/realigned design + reqstream docs and updated .reviewmark.yaml (including switching some review sets to glob patterns).

Reviewed changes

Copilot reviewed 26 out of 30 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/DemaConsulting.VersionMark/Program.cs	Adds subsystem namespace imports after moving types into subsystem namespaces.
src/DemaConsulting.VersionMark/Cli/Context.cs	Moves Context into Cli/ folder + ...VersionMark.Cli namespace.
src/DemaConsulting.VersionMark/Configuration/VersionMarkConfig.cs	Moves configuration types into Configuration/ folder + namespace; updates cross-subsystem using.
src/DemaConsulting.VersionMark/Capture/VersionInfo.cs	Moves VersionInfo into Capture/ folder + namespace.
src/DemaConsulting.VersionMark/Publishing/MarkdownFormatter.cs	Moves markdown formatter into Publishing/ folder + namespace.
src/DemaConsulting.VersionMark/Linting/Lint.cs	Moves lint logic into Linting/ folder + namespace; updates references to Cli.Context.
src/DemaConsulting.VersionMark/SelfTest/Validation.cs	Moves validation runner into SelfTest/ folder + namespace; updates cross-subsystem imports.
src/DemaConsulting.VersionMark/SelfTest/PathHelpers.cs	Moves path helpers into SelfTest/ folder + namespace.
test/DemaConsulting.VersionMark.Tests/ProgramTests.cs	Adds subsystem usings required by the new production namespaces.
test/DemaConsulting.VersionMark.Tests/IntegrationTests.cs	Adds subsystem usings required by the new production namespaces.
test/DemaConsulting.VersionMark.Tests/Cli/ContextTests.cs	Moves tests under Cli/ folder + ...Tests.Cli namespace; updates usings.
test/DemaConsulting.VersionMark.Tests/Configuration/VersionMarkConfigTests.cs	Moves tests under Configuration/ folder + namespace; updates usings.
test/DemaConsulting.VersionMark.Tests/Capture/VersionInfoTests.cs	Moves tests under Capture/ folder + namespace; updates usings.
test/DemaConsulting.VersionMark.Tests/Publishing/MarkdownFormatterTests.cs	Moves tests under Publishing/ folder + namespace; updates usings.
test/DemaConsulting.VersionMark.Tests/Linting/LintTests.cs	Moves tests under Linting/ folder + namespace; updates usings.
test/DemaConsulting.VersionMark.Tests/SelfTest/PathHelpersTests.cs	Moves tests under SelfTest/ folder + namespace; updates usings.
requirements.yaml	Updates included reqstream file names to the new subsystem naming.
docs/reqstream/subsystem-cli.yaml	Adds renamed subsystem requirements file for CLI.
docs/reqstream/subsystem-publishing.yaml	Adds renamed subsystem requirements file for Publishing.
docs/reqstream/subsystem-linting.yaml	Adds renamed subsystem requirements file for Linting.
docs/reqstream/subsystem-selftest.yaml	Adds renamed subsystem requirements file for SelfTest.
docs/design/introduction.md	Updates subsystem names and adds a folder layout section describing the new tree.
docs/design/system.md	Updates subsystem naming references in the system interaction diagrams/text.
docs/design/subsystem-cli.md	Renames subsystem doc title to “Cli”.
docs/design/subsystem-publishing.md	Renames subsystem doc title to “Publishing”.
docs/design/subsystem-linting.md	Renames subsystem doc title to “Linting”.
docs/design/subsystem-selftest.md	Renames subsystem doc title to “SelfTest”.
docs/design/definition.yaml	Updates the design definition input file list to the renamed subsystem docs.
.reviewmark.yaml	Updates review set IDs/titles and switches some sets to glob patterns for future-proofing.
.cspell.yaml	Adds SelfTest/selftest to project word list to avoid spelling false-positives.

Comments suppressed due to low confidence (4)

docs/design/subsystem-selftest.md:5

• The header was renamed to “SelfTest Subsystem”, but the overview text still describes it as the “validation subsystem”. Update the narrative to consistently use the new subsystem name (e.g., “SelfTest Subsystem” / “Self-Validation”).
  docs/design/subsystem-cli.md:5
• The title uses “Cli Subsystem”, but the overview text still refers to the “command-line interface subsystem”. Update the narrative to consistently use the new subsystem name to avoid mixed terminology.
  docs/design/subsystem-publishing.md:5
• The title is “Publishing Subsystem”, but the overview text still calls it the “publish subsystem”. Update the wording to consistently use “Publishing Subsystem” throughout this document.
  docs/design/subsystem-linting.md:5
• The title is “Linting Subsystem”, but the overview text still refers to the “lint subsystem”. Update the narrative to consistently use “Linting Subsystem” to match the renamed subsystem/folder.

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