chore: remove unused shadcn ui components and their Radix deps

badge.tsx, dialog.tsx, and separator.tsx were never imported anywhere
in the app. Drop them along with @radix-ui/react-dialog and
@radix-ui/react-separator, which had no other consumers.

package.json

@@ -17,9 +17,7 @@
   "dependencies": {
     "@prisma/client": "^5.15.0",
     "@radix-ui/react-alert-dialog": "^1.1.23",
-    "@radix-ui/react-dialog": "^1.1.23",
     "@radix-ui/react-label": "^2.1.15",
-    "@radix-ui/react-separator": "^1.1.15",
     "@radix-ui/react-slot": "^1.3.3",
     "@radix-ui/react-switch": "^1.3.7",
     "@radix-ui/react-tabs": "^1.1.21",