feat: add task comments feature with CRUD operations

- Introduced a new `task_comments` table in the database schema.
- Implemented task comments API endpoints for listing, creating, and deleting comments.
- Enhanced the task detail dialog to display comments and allow users to add new comments.
- Updated task row component to handle click events for viewing task details.
- Added a theme provider to manage light/dark mode across the application.
- Refactored Milkdown editor to use Crepe for improved markdown editing experience.
- Updated global styles to accommodate new editor and theme changes.
- Enhanced task filtering and sorting functionality in the tasks page.

src/main/db/index.ts

@@ -53,6 +53,14 @@ const MIGRATION_SQL = `
     created_at INTEGER NOT NULL,
     updated_at INTEGER NOT NULL
   );
+
+  CREATE TABLE IF NOT EXISTS task_comments (
+    id TEXT PRIMARY KEY,
+    task_id TEXT NOT NULL,
+    author TEXT NOT NULL,
+    content TEXT NOT NULL,
+    created_at INTEGER NOT NULL
+  );
 `;
 
 type DbInstance = ReturnType<typeof drizzle<typeof schema>>;