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

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

@@ -0,0 +1,33 @@
+export interface CurrencyDto {
+  id: string;
+  code: string;
+  name: string;
+  symbol: string;
+  numericCode: number;
+  decimalDigits: number;
+  isActive: boolean;
+  createdOn?: string;
+  modifiedOn?: string | null;
+}
+
+
+export interface CurrencyLookupDto {
+  readonly id: string;
+  readonly code: string;
+  readonly name: string;
+  readonly symbol: string;
+}
+
+export interface CreateCurrencyRequest {
+  code: string;
+  name: string;
+  symbol: string;
+  numericCode: number;
+  decimalDigits: number;
+}
+
+export interface UpdateCurrencyRequest extends CreateCurrencyRequest {
+  isActive: boolean;
+}
+
+export type CurrencyModalMode = 'create' | 'edit';