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/hooks/use-metrics.ts

@@ -2,6 +2,10 @@ import { useState, useEffect, useTransition, useCallback } from 'react';
 import { getWeeklyMetrics, getVelocityTrends } from '@/actions/metrics';
 import { WeeklyMetricsOverview, VelocityTrend } from '@/services/metrics';
 
+// Export des types pour les composants
+export type WeeklyMetrics = WeeklyMetricsOverview;
+export type { VelocityTrend };
+
 export function useWeeklyMetrics(date?: Date) {
   const [metrics, setMetrics] = useState<WeeklyMetricsOverview | null>(null);
   const [error, setError] = useState<string | null>(null);