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.

src/lib/utils.ts

@@ -0,0 +1,6 @@
+import { clsx, type ClassValue } from "clsx"
+import { twMerge } from "tailwind-merge"
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs))
+}