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.

components.json

@@ -0,0 +1,25 @@
+{
+  "$schema": "https://ui.shadcn.com/schema.json",
+  "style": "base-nova",
+  "rsc": true,
+  "tsx": true,
+  "tailwind": {
+    "config": "",
+    "css": "src/app/globals.css",
+    "baseColor": "neutral",
+    "cssVariables": true,
+    "prefix": ""
+  },
+  "iconLibrary": "lucide",
+  "rtl": false,
+  "aliases": {
+    "components": "@/components",
+    "utils": "@/lib/utils",
+    "ui": "@/components/ui",
+    "lib": "@/lib",
+    "hooks": "@/hooks"
+  },
+  "menuColor": "default",
+  "menuAccent": "subtle",
+  "registries": {}
+}