added first lit component for example

frontend/src/components/player.js

@@ -0,0 +1,21 @@
+import {LitElement, html} from 'lit';
+
+export class Player extends LitElement {
+  static properties = {
+    version: {},
+  };
+
+  constructor() {
+    super();
+    this.version = 'STARTING';
+  }
+
+  render() {
+    return html`
+    <p>Welcome to the Lit tutorial!</p>
+    <p>This is the ${this.version} code.</p>
+    `;
+  }
+}
+customElements.define('player-controls', Player);
+