Implement basic scene manager with ability to switch between scenes

src/scenes/LegacyScene.ts

@@ -0,0 +1,16 @@
+import { mp5 } from '../../main';
+import { SceneManager } from './SceneManager';
+import { Scenes } from './scenes';
+
+export class LegacyScene {
+  constructor() {}
+
+  draw() {
+    mp5.background(100);
+  }
+
+  onSceneClick(sm: SceneManager) {
+    console.log('Click on legacy scene');
+    sm.changeSceneTo(Scenes.OVERVIEW);
+  }
+}