feat(task-management): enhance task grouping and localization support

- Implemented unmapped task grouping for better organization of tasks without valid phases.
- Updated task distribution logic to handle unmapped tasks and added a corresponding group in the response.
- Enhanced localization by adding translations for "noTasksInGroup" in multiple languages.
- Improved task list components to support custom columns and better task management features.
- Refactored task management slice to include loading states for columns and custom columns.

worklenz-frontend/src/features/projects/singleProject/phase/ConfigPhaseButton.tsx

@@ -24,7 +24,7 @@ const ConfigPhaseButton = () => {
         onClick={() => dispatch(toggleDrawer())}
         icon={
           <SettingOutlined
-            style={{ color: themeMode === 'dark' ? colors.white : colors.skyBlue }}
+            style={{ color: themeMode === 'dark' ? colors.white : 'black' }}
           />
         }
       />