feat(devtools): integrate tanstack unified devtools

Add @tanstack/react-devtools package and replace separate devtools panels with unified TanStackDevtools component. Configure plugins for Query and Router devtools with different default open states.

Author: Muromi-Rikka

package.json

@@ -53,6 +53,7 @@
     "@tailwindcss/postcss": "^4.1.16",
     "@tanstack/eslint-plugin-query": "^5.91.2",
     "@tanstack/eslint-plugin-router": "^1.133.19",
+    "@tanstack/react-devtools": "^0.7.11",
     "@tanstack/react-query-devtools": "^5.90.2",
     "@tanstack/react-router-devtools": "^1.133.36",
     "@tanstack/router-plugin": "^1.133.36",