feat: Add Diff View and File History Tracking

- Implemented a new Diff View in the Workbench to visualize file changes
- Added file history tracking with detailed change information
- Enhanced FileTree and FileModifiedDropdown to show line additions and deletions
- Integrated file history saving and retrieval in ActionRunner
- Updated Workbench view types to include 'diff' option
- Added support for inline and side-by-side diff view modes

package.json

@@ -74,6 +74,8 @@
     "@radix-ui/react-switch": "^1.1.1",
     "@radix-ui/react-tabs": "^1.1.2",
     "@radix-ui/react-tooltip": "^1.1.4",
+    "lucide-react": "^0.474.0",
+    "next-themes": "^0.4.4",
     "@remix-run/cloudflare": "^2.15.2",
     "@remix-run/cloudflare-pages": "^2.15.2",
     "@remix-run/node": "^2.15.2",