feat(admin-center): implement organization calculation method settings

- Added functionality to update the organization's calculation method (hourly or man-days) in the Admin Center.
- Created a new component for managing the calculation method, including UI elements for selection and saving changes.
- Updated API service to handle the new endpoint for updating the calculation method.
- Enhanced localization files to support new keys related to the calculation method settings.
- Introduced a settings page to manage organization working days and hours alongside the calculation method.

worklenz-frontend/public/locales/en/admin-center/settings.json

@@ -0,0 +1,17 @@
+{
+  "settings": "Settings",
+  "organizationWorkingDaysAndHours": "Organization Working Days & Hours",
+  "workingDays": "Working Days",
+  "workingHours": "Working Hours",
+  "hours": "hours",
+  "monday": "Monday",
+  "tuesday": "Tuesday",
+  "wednesday": "Wednesday",
+  "thursday": "Thursday",
+  "friday": "Friday",
+  "saturday": "Saturday",
+  "sunday": "Sunday",
+  "saveButton": "Save",
+  "saved": "Settings saved successfully",
+  "errorSaving": "Error saving settings"
+}