feat(custom-columns): enhance task management with custom column support

- Added custom column values to task responses in the API for better task management flexibility.
- Implemented custom column components in the frontend, including dropdowns and date pickers, to improve user interaction.
- Updated TaskListV2 and TaskRow components to handle custom columns, ensuring proper rendering and functionality.
- Introduced a new PeopleDropdown component for selecting team members in custom columns, enhancing usability.
- Enhanced styling for custom column components to support both light and dark modes, improving visual consistency.

worklenz-backend/src/controllers/tasks-controller-v2.ts

@@ -1085,6 +1085,7 @@ export default class TasksControllerV2 extends TasksControllerBase {
           logged: convertTimeValue(task.time_spent),
         },
         customFields: {},
+        custom_column_values: task.custom_column_values || {}, // Include custom column values
         createdAt: task.created_at || new Date().toISOString(),
         updatedAt: task.updated_at || new Date().toISOString(),
         order: typeof task.sort_order === "number" ? task.sort_order : 0,