added language routing system

src/app/pipes/lang-route.pipe.ts

@@ -0,0 +1,25 @@
+import { Pipe, PipeTransform, inject } from '@angular/core';
+import { LanguageService } from '../services/language.service';
+
+@Pipe({
+  name: 'langRoute',
+  pure: false
+})
+export class LangRoutePipe implements PipeTransform {
+  private langService = inject(LanguageService);
+
+  transform(value: string | (string | number)[]): string | (string | number)[] {
+    const lang = this.langService.currentLanguage();
+
+    if (typeof value === 'string') {
+      return value === '/' ? `/${lang}` : `/${lang}${value}`;
+    }
+
+    if (Array.isArray(value) && value.length > 0) {
+      const [first, ...rest] = value;
+      return [`/${lang}${first}`, ...rest];
+    }
+
+    return value;
+  }
+}