Fixing NPM package generation

The generation was broken due to the refactoring in several classes (some of them where not properly exported).
Also, trying to generate the NPM package on every build now (to detect issues).

front/src/Api/iframe/controls.ts

@@ -1,16 +1,15 @@
-import { IframeApiContribution, sendToWorkadventure } from './IframeApiContribution';
+import { IframeApiContribution, sendToWorkadventure } from "./IframeApiContribution";
 
-class WorkadventureControlsCommands extends IframeApiContribution<WorkadventureControlsCommands> {
-    callbacks = []
+export class WorkadventureControlsCommands extends IframeApiContribution<WorkadventureControlsCommands> {
+    callbacks = [];
 
     disablePlayerControls(): void {
-        sendToWorkadventure({ 'type': 'disablePlayerControls', data: null });
+        sendToWorkadventure({ type: "disablePlayerControls", data: null });
     }
 
     restorePlayerControls(): void {
-        sendToWorkadventure({ 'type': 'restorePlayerControls', data: null });
+        sendToWorkadventure({ type: "restorePlayerControls", data: null });
     }
 }
 
-
 export default new WorkadventureControlsCommands();