Add Chamber page with interactive voidlings and localStorage persistence

- Set up React Router for navigation between landing and Chamber pages
- Create Chamber page with floating animated voidlings
- Add ability to summon, name, rename, and release voidlings
- Implement mood system (idle, happy, curious, sleepy)
- Add localStorage persistence to remember voidlings between sessions
- Add float animation and visual effects

package.json

@@ -11,7 +11,8 @@
   },
   "dependencies": {
     "react": "^19.2.0",
-    "react-dom": "^19.2.0"
+    "react-dom": "^19.2.0",
+    "react-router-dom": "^7.13.1"
   },
   "devDependencies": {
     "@eslint/js": "^9.39.1",