feat(react): add useWrnStore bridge over useSyncExternalStore

Resolves WRNexus stores from inside islands, reading through the cached
snapshot so React sees a stable reference. Unknown store names throw
with the list of registered stores rather than failing opaquely.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

package.json

@@ -71,12 +71,16 @@
   "devDependencies": {
     "@eslint/js": "^10.0.1",
     "@types/bun": "^1.3.14",
-    "eslint": "^10.8.0",
-    "happy-dom": "^20.11.1",
+    "@types/react": "^19.2.18",
+    "@types/react-dom": "^19.2.4",
+    "eslint": "^10.8.1",
+    "happy-dom": "^20.11.2",
     "prettier": "^3.9.6",
+    "react": "^19",
+    "react-dom": "^19",
     "tsup": "^8.5.1",
-    "typescript": "^5.9.3",
-    "typescript-eslint": "^8.65.0"
+    "typescript": "^6.0.3",
+    "typescript-eslint": "^8.67.0"
   },
   "engines": {
     "bun": ">=1.3.0"