Update frontend dependencies, enhance Vite configuration, and refactor components

- Added new dependencies including @base-ui/react, @fontsource-variable/geist, and tailwindcss for improved UI and styling.
- Updated Vite configuration to include path aliasing for easier imports.
- Refactored App.jsx to implement a theme context and improved routing structure.
- Enhanced various components (e.g., ConfirmDialog, DataTable) to utilize new UI components and improve user experience.
- Cleaned up CSS imports and ensured proper styling integration.

Made-with: Cursor

frontend/tailwind.config.js

@@ -0,0 +1,15 @@
+import tailwindcssAnimate from "tailwindcss-animate"
+
+/** @type {import('tailwindcss').Config} */
+export default {
+  darkMode: ["class"],
+  content: [
+    "./index.html",
+    "./src/**/*.{js,jsx,ts,tsx}",
+  ],
+  theme: {
+    extend: {},
+  },
+  plugins: [tailwindcssAnimate],
+}
+