Add support for project-specific .roomodes

[mrubens]

---

Important

Add support for project-specific .roomodes files, allowing mode configurations to be defined per project with precedence over global settings.

• Behavior:
  • Add support for project-specific .roomodes files in CustomModesManager.ts.
  • .roomodes takes precedence over global settings when merging modes.
  • Update mode creation and editing in PromptsView.tsx to allow source selection (global or project).
• Functions:
  • Add getWorkspaceRoomodes(), loadModesFromFile(), mergeCustomModes() in CustomModesManager.ts.
  • Update watchCustomModesFiles() to handle .roomodes changes.
• Tests:
  • Add tests for .roomodes precedence and error handling in CustomModesManager.test.ts.
• UI:
  • Update PromptsView.tsx to include source selection for modes.
  • Add CSS variables for VSCode colors in index.css.
• Misc:
  • Update modes.ts to include source in ModeConfig.

^{This description was created by for 1b56be0. It will automatically update as commits are pushed.}

[changeset-bot]

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Latest commit: 1b56be0

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[cte]

Looks great to me.