feat: add multiple UI components

This commit introduces a batch of UI components such as Accordion, Alert, Avatar, Badge, etc. Each component is provided with proper TypeScript type definitions. Reusable styling is catered for many of these using the `cn` utility for applying styles. Integration with `@radix-ui/react-*` libraries is also evident in some components for advanced and flexible functionality.

src/components/ui/collapsible.tsx

@@ -0,0 +1,11 @@
+"use client"
+
+import * as CollapsiblePrimitive from "@radix-ui/react-collapsible"
+
+const Collapsible = CollapsiblePrimitive.Root
+
+const CollapsibleTrigger = CollapsiblePrimitive.CollapsibleTrigger
+
+const CollapsibleContent = CollapsiblePrimitive.CollapsibleContent
+
+export { Collapsible, CollapsibleTrigger, CollapsibleContent }