feat(task-management): enhance bulk action bar and localization updates

- Added new features to the OptimizedBulkActionBar, including dropdowns for labels and assignees, improving task management capabilities.
- Integrated task template creation functionality for owners/admins, allowing users to create templates from selected tasks.
- Updated localization files for multiple languages, adding new strings for label searching and template name requirements to enhance user experience.
- Refactored LabelsDropdown component to support label filtering and improved UI feedback for label creation.

worklenz-frontend/public/locales/en/tasks/task-table-bulk-actions.json

@@ -17,7 +17,9 @@
     "createTaskTemplate": "Create Task Template",
     "apply": "Apply",
     "createLabel": "+ Create Label",
+    "searchOrCreateLabel": "Search or create label...",
     "hitEnterToCreate": "Press Enter to create",
+    "labelExists": "Label already exists",
     "pendingInvitation": "Pending Invitation",
     "noMatchingLabels": "No matching labels",
     "noLabels": "No labels",