Revamp extension README for clarity and completeness

[adamint]

Description

Revamps the VS Code extension README and makes a few related naming changes for clarity and consistency.

README overhaul

• Rewrote the entire README with a clear structure: table of contents, features overview, prerequisites, getting started, running/debugging, sidebar, dashboard, commands, language support, settings, MCP, and feedback
• Replaced stiff, buzzword-heavy prose with plain, conversational language
• Consolidated redundant content (merged recommended extensions into the language support table, folded JSON schema docs into settings)
• Reduced the settings table to the 4 most useful settings, with a note pointing to VS Code settings for the rest
• Consolidated 4 separate command sub-tables into one flat table grouped by function
• Removed shell CLI install commands from prerequisites — just links to the install guide and the VS Code command
• Removed ".NET Aspire" branding (just "Aspire" now)
• Added the existing dashboard screenshot to the Dashboard section

Command and view renames

• Renamed "Initialize Aspire" → "Initialize Aspire in an existing codebase" (package.nls.json)
• Capitalized the view name from "Running apphosts" → "Running AppHosts" so the auto-generated VS Code focus command reads correctly (package.nls.json)

Azure Functions correction

• Updated the language/debugger support table to reflect that Azure Functions debugging supports C#, JS/TS, and Python (not just C#)

Checklist

• Is this feature complete?
  • Yes. Ready to ship.
  • No. Follow-up changes expected.
• Are you including unit tests for the changes and scenario tests if relevant?
  • Yes
  • No
• Did you add public API?
  • Yes
  • No
• Does the change make any security assumptions or guarantees?
  • Yes
  • No
• Does the change require an update in our Aspire docs?
  • Yes
  • No

[github-actions]

🚀 Dogfood this PR with:

⚠️ WARNING: Do not do this without first carefully reviewing the code of this PR to satisfy yourself it is safe.

curl -fsSL https://raw.githubusercontent.com/dotnet/aspire/main/eng/scripts/get-aspire-cli-pr.sh | bash -s -- 15156

Or

• Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/dotnet/aspire/main/eng/scripts/get-aspire-cli-pr.ps1) } 15156"

[Copilot]

Pull request overview

Revamps extension/README.md to be a more complete, public-facing guide for the Aspire VS Code extension, covering core workflows (run/debug/deploy), UI surfaces (sidebar/dashboard), settings, and MCP integration.

Changes:

• Reorganized the README with a table of contents and clearer sections (features, prerequisites, getting started, sidebar/dashboard, commands, language support, settings, MCP, feedback).
• Consolidated and simplified command/settings documentation into cleaner tables and shorter lists.
• Updated wording/branding for readability and consistency (“Aspire” vs “.NET Aspire”, removed emoji, more conversational prose).

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