fix(studio): Docs for Data Designer

[steramae-nvidia]

Signed-off-by: Sean Teramae steramae@nvidia.com

Summary by CodeRabbit

• Documentation
  • Added a new Data Designer guide for NeMo Studio.
  • Documented the end-to-end workflow, from creating/selecting jobs and building recipes to previewing generated rows, submitting jobs, and reviewing job results.
  • Included guidance on validation, job details (profile/data/output), and how edits persist by file format.
  • Added the guide to the Studio documentation navigation.

[steramae-nvidia]

This change is part of the following stack:

• fix(studio): Docs for Data Designer #790 ◀

_{Change managed by git-spice.}

[coderabbitai]

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ℹ️ Recent review info

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Reviewing files that changed from the base of the PR and between 9b67d93 and 96d5a6f.

📒 Files selected for processing (1)

• docs/studio/data-designer-build.mdx

💤 Files with no reviewable changes (1)

• docs/studio/data-designer-build.mdx

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📝 Walkthrough

Walkthrough

Added Data Designer documentation and Studio navigation, plus generated-file checks that isolate newly introduced changes from pre-existing diffs.

Changes

Data Designer documentation

Layer / File(s)	Summary
Navigation and job entry flow docs/fern/versions/latest.yml, docs/studio/data-designer-build.mdx	Adds the Data Designer navigation entry and documents job listing, filtering, and creation entry points.
Builder configuration and job creation docs/studio/data-designer-build.mdx	Documents the DAG builder, columns, models, validation, preview, and job creation behavior.
Job details and output editing docs/studio/data-designer-build.mdx	Describes completed job details, output files, row editing, persistence rules, limitations, and related topics.

Generated-file synchronization checks

Layer / File(s)	Summary
Newly generated file detection web/packages/scripts/src/check-generated-files.ts	Captures the initial changed-file set, reports only newly changed files after generation, and preserves mismatch failure behavior.

Suggested labels: docs

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title matches the main change: adding Studio documentation for Data Designer.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch steramae/dd-docs

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[github-actions]

Suite	Lines Covered	Line Rate	Branch Rate
Unit Tests	26385/34036	77.5%	61.7%
Integration Tests	15175/32661	46.5%	18.7%

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@web/packages/scripts/src/check-generated-files.ts`:
- Around line 11-12: Update the before/after snapshots in the generated-file
check around execAsync and beforeFiles to use path-only output from the same
repository reference, such as git diff --name-only HEAD, so staged changes and
status metadata do not produce false new-file reports. Apply the same snapshot
logic to the corresponding after-state handling, and include untracked files if
pnpm gen can create them.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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📥 Commits

Reviewing files that changed from the base of the PR and between 5b32fe8 and 9b67d93.

📒 Files selected for processing (1)

• web/packages/scripts/src/check-generated-files.ts