feat(web): add TanStack devtools and form context setup

- Add @tanstack/react-devtools, react-query-devtools, react-form-devtools
- Create TanStackDevTools component with conditional loading via NEXT_PUBLIC_ENABLE_DEVTOOLS
- Add form-context.ts with useAppForm and withForm hooks template

Author: gracefullight

apps/web/package.json

@@ -20,8 +20,11 @@
     "next": "^16.1.1",
     "react": "^19.2.3",
     "react-dom": "^19.2.3",
-    "@tanstack/react-query": "^5.90.16",
+    "@tanstack/react-devtools": "^0.9.1",
     "@tanstack/react-form": "^1.27.7",
+    "@tanstack/react-form-devtools": "^0.2.11",
+    "@tanstack/react-query": "^5.90.16",
+    "@tanstack/react-query-devtools": "^5.91.2",
     "jotai": "^2.16.1",
     "jotai-location": "^0.6.2",
     "zod": "^4.2.1",