feat: update frontend dependencies and add theme toggle functionality

- Updated package.json to include new dependencies for theme management and UI components.
- Enhanced globals.css with new color variables and imported tw-animate-css for animations.
- Refactored layout.tsx to integrate ThemeProvider for theme management.
- Added ThemeToggle component for switching between light, dark, and system themes.
- Created reusable Card component and its subcomponents for consistent UI design.
- Introduced utility function `cn` for merging class names with Tailwind CSS.

Author: KayvanShah1

frontend/components.json

@@ -0,0 +1,21 @@
+{
+  "$schema": "https://ui.shadcn.com/schema.json",
+  "style": "new-york",
+  "rsc": true,
+  "tsx": true,
+  "tailwind": {
+    "config": "",
+    "css": "src/app/globals.css",
+    "baseColor": "stone",
+    "cssVariables": true,
+    "prefix": ""
+  },
+  "iconLibrary": "lucide",
+  "aliases": {
+    "components": "@/components",
+    "utils": "@/lib/utils",
+    "ui": "@/components/ui",
+    "lib": "@/lib",
+    "hooks": "@/hooks"
+  }
+}