feat: add database support, conversation sidebar, and improve chat streaming

- Update .gitignore to exclude database files, extensions, and .cursor directory
- Enhance chat streaming API with safe enqueue and close functions to prevent errors
- Integrate ConversationSidebar component into ClientHome for better UI
- Add dependencies like better-sqlite3 and esbuild packages for database functionality

This commit introduces database persistence for conversations, improves error handling in streaming responses, and adds a sidebar for managing chats, enhancing overall app robustness and user experience.

pnpm-workspace.yaml

@@ -1,2 +1,6 @@
 ignoredBuiltDependencies:
   - sharp
+
+onlyBuiltDependencies:
+  - better-sqlite3
+  - sqlite3