added lit typescript plugins

frontend/src/components/audio-player/audio-player.ts

@@ -5,8 +5,8 @@ import './seekbar/seek-bar';
 
 const audioPlayer = () => html`
 <div>
-<player-controls></player-controls>
-<seek-bar></seek-bar>
+  <player-controls></player-controls>
+  <seek-bar></seek-bar>
 </div>
 `;
 

frontend/src/components/audio-player/controls/player-controls.ts

@@ -5,7 +5,7 @@ import { Play } from '@go/player/Player';
 @customElement('player-controls')
 export class PlayerControls extends LitElement {
 
-  render() {
+  override render() {
     return html`
 <div>
   <button>