feat: challange request, accept, decline, page, added (not complete, polling issues, and not stable, and too much code for nothing)

Co-authored-by: Copilot <copilot@github.com>

src/app/app.routes.ts

@@ -2,10 +2,12 @@ import { Routes } from '@angular/router';
 import { GameComponent } from './pages/game/game.component';
 import { WelcomeComponent } from './pages/welcome/welcome.component';
 import { ProfileComponent } from './pages/profile/profile.component';
+import { ChallengesComponent } from './pages/challenges/challenges.component';
 
 export const routes: Routes = [
   { path: '', component: WelcomeComponent },
   { path: 'profile', component: ProfileComponent },
+  { path: 'challenges', component: ChallengesComponent },
   { path: 'game/:gameId', component: GameComponent },
   { path: '**', redirectTo: '' }
 ];