feat: add preventFocusDisruption setting to prevent editor focus stealing

[roomote]

This PR implements an experimental setting to prevent file edits from stealing focus, addressing the issue where diff views disrupt the user's workflow.

Summary

When Roo Code edits files, it opens diff views that steal focus from whatever the user is currently working on. This creates a frustrating experience where users cannot work alongside Roo effectively. This PR adds a new experimental setting roo-cline.preventFocusDisruption that prevents this behavior.

Changes

• Added new configuration property roo-cline.preventFocusDisruption (default: false)
• Updated DiffViewProvider to check the setting before showing documents or focusing
• When enabled, file edits happen in the background without disrupting the user's current focus
• Added comprehensive tests for the new functionality
• Added localization entry for the setting description

Testing

• All existing tests pass
• Added new test suite specifically for the preventFocusDisruption setting
• Tests cover:
  • Document showing behavior when setting is enabled/disabled
  • Focus preservation in diff views
  • Document restoration on revert

User Experience

When the setting is enabled:

• File edits happen silently in the background
• No diff views automatically open or steal focus
• Users can continue typing uninterrupted while Roo works
• Changes can be reviewed in the chat or by manually opening files

Fixes #4784

---

Important

Adds roo-cline.preventFocusDisruption setting to prevent file edits from stealing focus, with updates to DiffViewProvider and new tests.

• Behavior:
  • Adds roo-cline.preventFocusDisruption setting (default: false) to prevent file edits from stealing focus.
  • Updates DiffViewProvider to respect this setting, allowing file edits to occur in the background.
• Testing:
  • Adds tests in DiffViewProvider.spec.ts for preventFocusDisruption setting.
  • Tests cover document showing behavior, focus preservation, and document restoration on revert.
• Localization:
  • Adds localization entry for preventFocusDisruption setting description in package.nls.json.

^{This description was created by for e4a3e79. You can customize this summary. It will automatically update as commits are pushed.}