add endpoint configuration for city, currency, language, and timezone

src/app/core/models/city/city.model.ts

@@ -0,0 +1,26 @@
+export interface CityDto {
+  id: string;
+  stateId: string;
+  name: string;
+  code: string | null;
+  timezoneId: string | null;
+  isActive: boolean;
+  createdOn?: string;
+  modifiedOn?: string | null;
+}
+
+export interface CreateCityRequest {
+  stateId: string;
+  name: string;
+  code: string;
+  timezoneId: string | null;
+}
+
+export interface UpdateCityRequest {
+  name: string;
+  code: string;
+  timezoneId: string | null;
+  isActive: boolean;
+}
+
+export type CityModalMode = 'create' | 'edit' ;