feat(task-management): enhance task management UI with subtask functionality

- Added localization support for task management messages in multiple languages, including Albanian, German, English, Spanish, and Portuguese.
- Implemented subtask addition feature in the `TaskRow` component, allowing users to create and manage subtasks directly within the task interface.
- Introduced hover effects and improved styling for task rows to enhance user experience and interaction.
- Updated task indicators to display counts for subtasks, comments, and attachments, providing better visibility of task details.

worklenz-frontend/public/locales/en/task-management.json

@@ -1,5 +1,15 @@
 {
   "noTasksInGroup": "No tasks in this group",
   "noTasksInGroupDescription": "Add a task to get started",
-  "addFirstTask": "Add your first task"
+  "addFirstTask": "Add your first task",
+  "openTask": "Open",
+  "subtask": "subtask",
+  "subtasks": "subtasks",
+  "comment": "comment",
+  "comments": "comments",
+  "attachment": "attachment",
+  "attachments": "attachments",
+  "enterSubtaskName": "Enter subtask name...",
+  "add": "Add",
+  "cancel": "Cancel"
 }