feat(TaskManagement): implement centralized readonly field logic for task synchronization

- Added functionality to determine readonly fields based on task source (Jira, TFS) and status.
- Updated EditTaskForm and TaskBasicFields components to utilize readonly fields for better user experience.
- Introduced buildSyncUpdateData function to manage field preservation during synchronization.
- Enhanced tests for readonly field logic to ensure correct behavior across different scenarios.

src/lib/types.ts

@@ -66,6 +66,7 @@ export interface Task {
   assignee?: string;
   ownerId: string; // ID du propriétaire de la tâche
   todosCount?: number; // Nombre de todos reliés à cette tâche
+  readonlyFields?: string[]; // Liste des champs en lecture seule (pour les tâches synchronisées)
 }
 
 // Interface pour les tags