feat(task-list): add tooltips for task indicators and enhance localization

- Introduced tooltips for subtasks, comments, attachments, subscribers, dependencies, and recurring tasks across various components to improve user experience.
- Enhanced localization by adding new translation keys for these indicators in multiple languages, ensuring consistent messaging for users.
- Updated components such as TaskRow, KanbanTaskCard, and EnhancedKanbanTaskCard to utilize the new tooltip functionality, improving clarity and accessibility.

worklenz-frontend/src/components/enhanced-kanban/EnhancedKanbanTaskCard.tsx

@@ -193,28 +193,30 @@ const EnhancedKanbanTaskCard: React.FC<EnhancedKanbanTaskCardProps> = React.memo
 
               {/* Subtask Section - only show if count > 1 */}
               {task.sub_tasks_count != null && Number(task.sub_tasks_count) > 1 && (
-                <Button
-                  onClick={handleSubtaskButtonClick}
-                  size="small"
-                  style={{
-                    padding: 0,
-                  }}
-                  type="text"
-                >
-                  <Tag
-                    bordered={false}
+                <Tooltip title={t(`indicators.tooltips.subtasks${Number(task.sub_tasks_count) === 1 ? '' : '_plural'}`, { count: Number(task.sub_tasks_count) })}>
+                  <Button
+                    onClick={handleSubtaskButtonClick}
+                    size="small"
                     style={{
-                      display: 'flex',
-                      alignItems: 'center',
-                      margin: 0,
-                      backgroundColor: themeWiseColor('white', '#1e1e1e', themeMode),
+                      padding: 0,
                     }}
+                    type="text"
                   >
-                    <ForkOutlined rotate={90} />
-                    <span>{task.sub_tasks_count || 0}</span>
-                    {task.show_sub_tasks ? <CaretDownFilled /> : <CaretRightFilled />}
-                  </Tag>
-                </Button>
+                    <Tag
+                      bordered={false}
+                      style={{
+                        display: 'flex',
+                        alignItems: 'center',
+                        margin: 0,
+                        backgroundColor: themeWiseColor('white', '#1e1e1e', themeMode),
+                      }}
+                    >
+                      <ForkOutlined rotate={90} />
+                      <span>{task.sub_tasks_count || 0}</span>
+                      {task.show_sub_tasks ? <CaretDownFilled /> : <CaretRightFilled />}
+                    </Tag>
+                  </Button>
+                </Tooltip>
               )}
             </Flex>
           </Flex>