feat: implement Jira auto-sync scheduler and UI configuration

- Added `jiraAutoSync` and `jiraSyncInterval` fields to user preferences for scheduler configuration.
- Created `JiraScheduler` service to manage automatic synchronization with Jira based on user settings.
- Updated API route to handle scheduler actions and configuration updates.
- Introduced `JiraSchedulerConfig` component for user interface to control scheduler settings.
- Enhanced `TODO.md` to reflect completed tasks related to Jira synchronization features.

src/lib/types.ts

@@ -93,6 +93,8 @@ export interface UserPreferences {
   viewPreferences: ViewPreferences;
   columnVisibility: ColumnVisibility;
   jiraConfig: JiraConfig;
+  jiraAutoSync: boolean;
+  jiraSyncInterval: 'hourly' | 'daily' | 'weekly';
 }
 
 // Interface pour les logs de synchronisation