chore: move react from devDependency to dependency in design system s…

…tarter template (#8159)

### Description

I mentioned this in discussions, in the design system starter template,
react was specified as a devDependency rather than a dependency.
It needs to be moved to dependencies.

#8156

### Testing Instructions

---------

Co-authored-by: Anthony Shew <anthony.shew@vercel.com>

examples/design-system/packages/ui/package.json

@@ -21,11 +21,13 @@
     "@types/react": "^18.2.61",
     "@types/react-dom": "^18.2.19",
     "eslint": "^8.57.0",
-    "react": "^18.2.0",
     "@repo/typescript-config": "workspace:*",
     "tsup": "^8.0.2",
     "typescript": "^5.3.3"
   },
+  "dependencies": {
+    "react": "^18.2.0"
+  },
   "publishConfig": {
     "access": "public"
   }