feat: implement project ignore list for Jira synchronization

- Updated `JiraConfigForm` to include an input for ignored projects, allowing users to specify projects to exclude from synchronization.
- Enhanced `JiraService` with a method to filter out tasks from ignored projects, improving task management.
- Modified user preferences to store ignored projects, ensuring persistence across sessions.
- Updated API routes to handle ignored projects in configuration, enhancing overall functionality.
- Marked the corresponding task as complete in TODO.md.

services/user-preferences.ts

@@ -28,7 +28,8 @@ const DEFAULT_PREFERENCES: UserPreferences = {
     enabled: false,
     baseUrl: '',
     email: '',
-    apiToken: ''
+    apiToken: '',
+    ignoredProjects: []
   }
 };