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

.github/actions/setup-and-build/action.yaml

@@ -30,3 +30,7 @@ runs:
       run: |
         pnpm install
         pnpm run build
+
+    - name: Create history directory
+      shell: bash
+      run: mkdir -p .history