feat: update dependencies and add new UI components

- Added new dependencies: @base-ui/react, class-variance-authority, clsx, lucide-react, shadcn, tailwind-merge, and tw-animate-css.
- Updated globals.css to include new styles and color variables using oklch color space.
- Created components.json for shadcn configuration.
- Implemented a Button component using @base-ui/react and class-variance-authority for styling variants.
- Added utility function `cn` for merging class names with tailwind-merge.

package.json

@@ -10,9 +10,16 @@
     "format": "biome format --write"
   },
   "dependencies": {
+    "@base-ui/react": "^1.6.0",
+    "class-variance-authority": "^0.7.1",
+    "clsx": "^2.1.1",
+    "lucide-react": "^1.25.0",
     "next": "16.2.11",
     "react": "19.2.4",
-    "react-dom": "19.2.4"
+    "react-dom": "19.2.4",
+    "shadcn": "^4.14.0",
+    "tailwind-merge": "^3.6.0",
+    "tw-animate-css": "^1.4.0"
   },
   "devDependencies": {
     "@biomejs/biome": "2.2.0",