Add runtime event for when the project is loaded (#1669)

src/engine/runtime.js

@@ -402,6 +402,14 @@ class Runtime extends EventEmitter {
         return 'VISUAL_REPORT';
     }
 
+    /**
+     * Event name for project loaded report.
+     * @const {string}
+     */
+    static get PROJECT_LOADED () {
+        return 'PROJECT_LOADED';
+    }
+
     /**
      * Event name for targets update report.
      * @const {string}
@@ -1913,6 +1921,13 @@ class Runtime extends EventEmitter {
         return this._cloneCounter < Runtime.MAX_CLONES;
     }
 
+    /**
+     * Report that the project has loaded in the Virtual Machine.
+     */
+    emitProjectLoaded () {
+        this.emit(Runtime.PROJECT_LOADED);
+    }
+
     /**
      * Report that a new target has been created, possibly by cloning an existing target.
      * @param {Target} newTarget - the newly created target.