feat: add dropdown menu component using Radix UI

- Added a new `DropdownMenu` component with various subcomponents including `DropdownMenuTrigger`, `DropdownMenuContent`, and more.
- Updated `package.json` to include `@radix-ui/react-dropdown-menu` as a dependency.
- Updated `pnpm-lock.yaml` to reflect the new dependency and its version.

package.json

@@ -14,6 +14,7 @@
   },
   "dependencies": {
     "@radix-ui/react-dialog": "^1.1.15",
+    "@radix-ui/react-dropdown-menu": "^2.1.16",
     "@radix-ui/react-separator": "^1.1.7",
     "@radix-ui/react-slot": "^1.2.3",
     "@radix-ui/react-tooltip": "^1.2.8",