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/overview.json

@@ -4,5 +4,29 @@
   "owner": "Organization Owner",
   "admins": "Organization Admins",
   "contactNumber": "Add Contact Number",
-  "edit": "Edit"
+  "edit": "Edit",
+  "organizationWorkingDaysAndHours": "Organization Working Days & Hours",
+  "workingDays": "Working Days",
+  "workingHours": "Working Hours",
+  "monday": "Monday",
+  "tuesday": "Tuesday",
+  "wednesday": "Wednesday",
+  "thursday": "Thursday",
+  "friday": "Friday",
+  "saturday": "Saturday",
+  "sunday": "Sunday",
+  "hours": "hours",
+  "saveButton": "Save",
+  "saved": "Settings saved successfully",
+  "errorSaving": "Error saving settings",
+  "organizationCalculationMethod": "Organization Calculation Method",
+  "calculationMethod": "Calculation Method",
+  "hourlyRates": "Hourly Rates",
+  "manDays": "Man Days",
+  "saveChanges": "Save Changes",
+  "hourlyCalculationDescription": "All project costs will be calculated using estimated hours × hourly rates",
+  "manDaysCalculationDescription": "All project costs will be calculated using estimated man days × daily rates",
+  "calculationMethodTooltip": "This setting applies to all projects in your organization",
+  "calculationMethodUpdated": "Organization calculation method updated successfully",
+  "calculationMethodUpdateError": "Failed to update calculation method"
 }