feat: enhance metrics dashboard with new components and data handling

- Introduced `MetricsOverview`, `MetricsMainCharts`, `MetricsDistributionCharts`, `MetricsVelocitySection`, and `MetricsProductivitySection` for improved metrics visualization.
- Updated `MetricsTab` to integrate new components and streamline data presentation.
- Added compatibility fields in `JiraTask` and `AssigneeDistribution` for better data handling.
- Refactored `calculateAssigneeDistribution` to include a count for total issues.
- Enhanced `JiraAnalyticsService` and `JiraAdvancedFiltersService` to support new metrics calculations.
- Cleaned up unused imports and components for a more maintainable codebase.

src/actions/jira-sprint-details.ts

@@ -170,7 +170,8 @@ function calculateAssigneeDistribution(issues: JiraTask[]): AssigneeDistribution
     totalIssues: stats.total,
     completedIssues: stats.completed,
     inProgressIssues: stats.inProgress,
-    percentage: issues.length > 0 ? (stats.total / issues.length) * 100 : 0
+    percentage: issues.length > 0 ? (stats.total / issues.length) * 100 : 0,
+    count: stats.total // Ajout pour compatibilité
   })).sort((a, b) => b.totalIssues - a.totalIssues);
 }