Refactoring subtypes to make Maskwood Nexus work (ready for review) (#7432)

* removed and renamed SubTypeList

* updated subtype test

* refactored Changeling to be an ability that actually does something

* moved isAllCreatureTypes into SubTypes class

* renamed copyTo method to copyFrom

* added removeAllCreatureTypes where usable

* replaced some subtype methods

* replaced some more subtype methods

* replaced subtype mass add/remove methods

* updated more subtype methods

* fixed some errors

* made common shared creature type predicate

* refactored another card involving subtypes

* Added usage of object attribute in subTypes's write operations;

* Refactor: use same param styles in subtype methods

* Refactor: simplified usage of copy appliers;

* Refactor: fixed code usage in CopyApplier

Co-authored-by: Oleg Agafonov <jaydi85@gmail.com>

Mage/src/main/java/mage/game/permanent/PermanentImpl.java

@@ -1634,6 +1634,11 @@ public abstract class PermanentImpl extends CardImpl implements Permanent {
         this.createOrder = createOrder;
     }
 
+    @Override
+    public ObjectColor getColor() {
+        return color;
+    }
+
     @Override
     public ObjectColor getColor(Game game) {
         return color;