[Editor] Enable full support for map labels

From now on, the editor is capable to put map labels in the canavs as well as generate the map labels in output map serialized file.

api/src/main/java/com/bartlomiejpluta/base/api/map/layer/object/MapPin.java

@@ -0,0 +1,14 @@
+package com.bartlomiejpluta.base.api.map.layer.object;
+
+import lombok.Builder;
+import lombok.RequiredArgsConstructor;
+import lombok.Value;
+
+@Value
+@Builder
+public class MapPin {
+   String map;
+   int layer;
+   int x;
+   int y;
+}