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

src/index.css

@@ -1,5 +1,18 @@
 @import "tailwindcss";
 
+@keyframes float {
+  0%, 100% {
+    transform: translateY(0) translate(-50%, -50%);
+  }
+  50% {
+    transform: translateY(-20px) translate(-50%, -50%);
+  }
+}
+
+.animate-float {
+  animation: float 3s ease-in-out infinite;
+}
+
 :root {
   font-family: 'Courier New', Courier, monospace;
 }