Refactor move classes to implement respective interfaces for better structure

Plugins/PkmnLib.Plugin.Gen7/Scripts/Moves/MeFirst.cs

@@ -3,10 +3,10 @@ using PkmnLib.Plugin.Gen7.Scripts.MoveVolatile;
 namespace PkmnLib.Plugin.Gen7.Scripts.Moves;
 
 [Script(ScriptCategory.Move, "me_first")]
-public class MeFirst : Script
+public class MeFirst : Script, IScriptChangeMove
 {
     /// <inheritdoc />
-    public override void ChangeMove(IMoveChoice choice, ref StringKey moveName)
+    public void ChangeMove(IMoveChoice choice, ref StringKey moveName)
     {
         var battleData = choice.User.BattleData;
         if (battleData == null)