✨ Enhance app with multi-CCN support and improved UX

Features:

✅ Add support for multiple CCNs
🔍 Implement sidebar hiding functionality
🎨 Revamp navigation system for better flow
🖌️ Replace icons with custom-designed assets and improved naming
🚀 Streamline initial setup process
📝 Refine terminology (e.g., "forum thread" → "topic")
🛠️ Enhance forum usability and interaction

package.json

@@ -48,6 +48,7 @@
     "@nostr/tools": "npm:@jsr/nostr__tools",
     "@open-wc/lit-helpers": "^0.7.0",
     "@std/encoding": "npm:@jsr/std__encoding",
+    "iconify-icon": "^2.3.0",
     "lit": "^3.2.1",
     "markdown-it": "^14.1.0"
   }