feat(task-management): add progress statistics and visual representation for task groups

- Implemented progress calculations for tasks grouped by priority and phase, including todo, doing, and done counts.
- Introduced a new GroupProgressBar component to visually represent task progress in the TaskGroupHeader.
- Updated TaskGroupHeader and TaskListV2Table to integrate progress data and display the progress bar conditionally based on grouping.
- Enhanced local storage handling for grouping preferences in the task management feature.

worklenz-frontend/src/features/enhanced-kanban/enhanced-kanban.slice.ts

@@ -33,7 +33,7 @@ export const GROUP_BY_OPTIONS: IGroupByOption[] = [
   { label: 'Phase', value: IGroupBy.PHASE },
 ];
 
-const LOCALSTORAGE_GROUP_KEY = 'worklenz.enhanced-kanban.group_by';
+const LOCALSTORAGE_GROUP_KEY = 'worklenz.kanban.group_by';
 
 export const getCurrentGroup = (): IGroupBy => {
   const key = localStorage.getItem(LOCALSTORAGE_GROUP_KEY);