phaserLayers managed by Gamemap

Implementation of LayersFlattener
Implementation of Setting properties of a layer form script
Update show/hide layer form script
Update unit test of LayersIteratorTest

front/src/Api/Events/setPropertyEvent.ts

@@ -0,0 +1,12 @@
+import * as tg from "generic-type-guard";
+
+export const isSetPropertyEvent =
+    new tg.IsInterface().withProperties({
+        layerName: tg.isString,
+        propertyName: tg.isString,
+        propertyValue: tg.isUnion(tg.isString, tg.isUnion(tg.isNumber, tg.isUnion(tg.isBoolean, tg.isUndefined)))
+    }).get();
+/**
+ * A message sent from the iFrame to the game to change the value of the property of the layer
+ */
+export type SetPropertyEvent = tg.GuardedType<typeof isSetPropertyEvent>;