feat: Refactor code structure and optimize performance across multiple modules

mobile-apps/staff-app/lib/features/profile/role/data/gql.dart

@@ -0,0 +1,11 @@
+const String attachStaffRolesMutation = r'''
+  mutation AttachStaffRoles($roles: [AttachStaffSkillInput!]!) {
+    attach_staff_roles(roles: $roles){}
+  }
+  ''';
+
+const String detachStaffRolesMutation = r'''
+  mutation DetachStaffRoles($ids: [ID!]!) {
+    detach_staff_roles(ids: $ids)
+  }
+  ''';