Refactor frontend structure and update dependencies

- Changed the main entry point from main.jsx to main.tsx for TypeScript support.
- Removed Tabler JS import and integrated Tailwind CSS for styling.
- Updated package.json and package-lock.json to include new dependencies such as @fontsource-variable/geist and tailwindcss, while removing unused ones.
- Enhanced Vite configuration with path aliasing for improved import management.
- Deleted unused App.css and App.jsx files to streamline the project structure.

Made-with: Cursor

frontend/package.json

@@ -15,18 +15,29 @@
     "@dnd-kit/core": "^6.3.1",
     "@dnd-kit/sortable": "^10.0.0",
     "@dnd-kit/utilities": "^3.2.2",
-    "@tabler/core": "^1.3.2",
-    "@tabler/icons-react": "^3.34.0",
+    "@fontsource-variable/geist": "^5.2.8",
+    "@tailwindcss/vite": "^4.2.4",
     "@tanstack/react-query": "^5.56.2",
     "@tanstack/react-virtual": "^3.10.8",
     "@xyflow/react": "^12.3.4",
     "axios": "^1.10.0",
+    "class-variance-authority": "^0.7.1",
+    "clsx": "^2.1.1",
+    "cmdk": "^1.1.1",
     "diff": "^8.0.3",
+    "lucide-react": "^1.11.0",
+    "next-themes": "^0.4.6",
+    "radix-ui": "^1.4.3",
     "react": "^19.1.0",
     "react-dom": "^19.1.0",
     "react-icons": "^5.5.0",
     "react-router-dom": "^6.30.1",
-    "recharts": "^3.7.0"
+    "recharts": "^3.7.0",
+    "shadcn": "^4.5.0",
+    "sonner": "^2.0.7",
+    "tailwind-merge": "^3.5.0",
+    "tailwindcss": "^4.2.4",
+    "tw-animate-css": "^1.4.0"
   },
   "devDependencies": {
     "@eslint/js": "^9.29.0",