feat(chat): Implement end-to-end encrypted swarm messaging system

- Add Swarm Chat documentation with architecture, API endpoints, and security considerations
- Create database schema for chat conversations, messages, and typing indicators
- Implement chat API endpoints for sending, receiving, and managing messages
- Add client-side encryption utilities using RSA-OAEP with SHA-256
- Create chat page UI for viewing conversations and messages
- Add chat type definitions for TypeScript support
- Update database schema with new chat tables and relationships
- Update sidebar navigation to include chat link
- Enable true end-to-end encrypted messaging across swarm nodes without ActivityPub limitations

drizzle/meta/_journal.json

@@ -57,6 +57,13 @@
       "when": 1769446756226,
       "tag": "0007_kind_agent_zero",
       "breakpoints": true
+    },
+    {
+      "idx": 8,
+      "version": "7",
+      "when": 1769453302714,
+      "tag": "0008_illegal_carlie_cooper",
+      "breakpoints": true
     }
   ]
 }