feat(core): implement translation

src/app/app.ts

@@ -1,4 +1,4 @@
-import { Component } from '@angular/core';
+import { Component, inject } from '@angular/core';
 import { RouterOutlet } from '@angular/router';
 import { ThemeSwitchService } from './core/service/theme-switch.service';
 import { Background } from "./core/components/background/background";
@@ -11,7 +11,9 @@ import { NavigationBar } from "./core/components/navigation-bar/navigation-bar";
 })
 export class App {
 
-  constructor(private themeSwitchService: ThemeSwitchService) {
+  private themeSwitchService = inject(ThemeSwitchService);
+
+  constructor() {
     this.themeSwitchService.initialize();
   }