FEATURE: add the ability to zoom in and out using touch screen

front/src/Phaser/UserInput/PinchManager.ts

@@ -0,0 +1,16 @@
+import {Pinch} from "phaser3-rex-plugins/plugins/gestures.js";
+
+export class PinchManager {
+    private scene: Phaser.Scene;
+    private pinch!: any;
+    
+    constructor(scene: Phaser.Scene) {
+        this.scene = scene;
+        this.pinch = new Pinch(scene);
+
+        this.pinch.on('pinch', (pinch:any) => {
+            this.scene.cameras.main.zoom *= pinch.scaleFactor;
+        });
+    }
+    
+}