feat: add audio features and sounds to the game

frontend/src/app/shared/services/audio.service.ts

@@ -0,0 +1,29 @@
+import { Injectable } from '@angular/core';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class AudioService {
+  private audioCache = new Map<string, HTMLAudioElement>();
+
+  private getAudio(soundName: string): HTMLAudioElement {
+    if (!this.audioCache.has(soundName)) {
+      const audio = new Audio(`/sounds/${soundName}`);
+      this.audioCache.set(soundName, audio);
+      return audio;
+    }
+    return this.audioCache.get(soundName)!;
+  }
+
+  playBetSound(): void {
+    const audio = this.getAudio('bet.mp3');
+    audio.currentTime = 0;
+    audio.play().catch(error => console.error('Error playing bet sound:', error));
+  }
+
+  playWinSound(): void {
+    const audio = this.getAudio('win.mp3');
+    audio.currentTime = 0;
+    audio.play().catch(error => console.error('Error playing win sound:', error));
+  }
+}