feat: Add character names to scenarios and UI

Introduces `characterName` to the `Scenario` type, enabling AI personas to be explicitly named. This change also updates the `ScenarioCard` component to display the character name and adds foundational support for potential future scenario deletion functionality. The README has been updated with a new AI Studio link.

components/VoiceSession/ConnectionState.tsx

@@ -0,0 +1,12 @@
+
+import React from 'react';
+import { Loader2 } from 'lucide-react';
+
+const ConnectionState: React.FC = () => (
+  <div className="flex flex-col items-center justify-center h-full text-slate-800 animate-pulse">
+    <Loader2 size={48} className="animate-spin text-teal-600 mb-4" />
+    <p className="font-bold uppercase tracking-widest text-xs">Opening Neural Bridge...</p>
+  </div>
+);
+
+export default React.memo(ConnectionState);