feat: add pnpm serve command for code-server development

[mrubens]

Summary

This adds a new pnpm serve command that builds and serves the Roo Code extension via code-server for web-based VS Code testing.

What it does

1. Checks if code-server is installed (provides install instructions if not)
2. Builds the extension as a vsix to a temp directory ($TMPDIR/roo-code-serve.vsix)
3. Installs the vsix into code-server
4. Configures user settings:
   • Disables welcome tab (workbench.startupEditor: none)
   • Hides secondary sidebar (workbench.auxiliaryBar.visible: false)
   • Disables extension recommendations (extensions.ignoreRecommendations: true)
5. Launches code-server with flags:
   • --disable-workspace-trust: Auto-trusts the workspace
   • --disable-getting-started-override: Disables getting started overlay
   • -e: Ignores last opened directory

New Commands

• pnpm serve - Build, install, and start code-server
• pnpm serve:rebuild - Only rebuild and reinstall the extension (for when code-server is already running)

Prerequisites

brew install code-server

Usage

# Start code-server with the extension
pnpm serve

# In another terminal, rebuild after making changes
pnpm serve:rebuild
# Then reload the code-server window (Cmd+Shift+P → Developer: Reload Window)

Then open http://127.0.0.1:8080 in your browser.
Password is stored in ~/.config/code-server/config.yaml

Why

This enables testing the extension in a web-based VS Code environment, which is useful for:

• Testing web-specific behavior
• Cross-browser testing
• Remote development scenarios

[roomote]

Rooviewer   See task on Roo Cloud

Review complete. No issues found.

This commit refactors the serve script by separating the "start server" and "build/install" functionality. pnpm serve now only starts code-server, while pnpm serve:install handles building and installing the extension. The naming change from serve:rebuild to serve:install better describes the command's purpose. The workflow is well-documented and the implementation is clean.

Previous reviews

• 466defc: Review #1
• 1b6b894: Review #2
• ad0c516: Review #3
• 203a6eb: Review #4

_{Mention @roomote in a comment to request specific changes to this pull request or fix all unresolved issues.}