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

app/utils/getLanguageFromExtension.ts

@@ -0,0 +1,24 @@
+export const getLanguageFromExtension = (ext: string): string => {
+  const map: Record<string, string> = {
+    js: "javascript",
+    jsx: "jsx",
+    ts: "typescript",
+    tsx: "tsx",
+    json: "json",
+    html: "html",
+    css: "css",
+    py: "python",
+    java: "java",
+    rb: "ruby",
+    cpp: "cpp",
+    c: "c",
+    cs: "csharp",
+    go: "go",
+    rs: "rust",
+    php: "php",
+    swift: "swift",
+    md: "plaintext",
+    sh: "bash",
+  };
+  return map[ext] || "typescript";
+};