[TDM] Implement harmonize mechanic (#13475)

* add initial ability

* remove skip list

* update harmonize ability

* add reminder text

* remove skip list

* add harmonize test

* update tests

* create base class for flashback-like abilities

Mage/src/main/java/mage/abilities/AbilityImpl.java

@@ -495,6 +495,7 @@ public abstract class AbilityImpl implements Ability {
             // A player can't apply two alternative methods of casting or two alternative costs to a single spell.
             switch (((SpellAbility) this).getSpellAbilityCastMode()) {
                 case FLASHBACK:
+                case HARMONIZE:
                 case MADNESS:
                 case TRANSFORMED:
                 case DISTURB: