feat(utils): add utility function for class merging

Introduced `cn` function leveraging `clsx` and `twMerge` to merge class names. This utility simplifies handling of conditional class names with Tailwind CSS.

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))
+}