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

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

@@ -0,0 +1,31 @@
+export interface LanguageDto {
+  id: string;
+  code: string;
+  name: string;
+  nativeName: string;
+  isRightToLeft: boolean;
+  isActive: boolean;
+  createdOn: string;
+  modifiedOn: string | null;
+}
+
+export interface LanguageLookupDto {
+  readonly id: string;
+  readonly code: string;
+  readonly name: string;
+  readonly nativeName: string;
+  readonly isRightToLeft: boolean;
+}
+
+export interface CreateLanguageRequest {
+  code: string;
+  name: string;
+  nativeName: string;
+  isRightToLeft: boolean;
+}
+
+export interface UpdateLanguageRequest extends CreateLanguageRequest {
+  isActive: boolean;
+}
+
+export type LanguageModalMode = 'create' | 'edit';