More abilities, refactor stealing held items

Plugins/PkmnLib.Plugin.Gen7/Scripts/Pokemon/FlinchEffect.cs

@@ -7,6 +7,11 @@ public class FlinchEffect : Script
     public override void PreventMove(IExecutingMove move, ref bool prevent)
     {
         prevent = true;
+        var args = new CustomTriggers.OnFlinchArgs(move);
+        move.RunScriptHook(x => x.CustomTrigger(CustomTriggers.OnFlinch, args));
+        if (args.Prevent)
+            return;
+
         RemoveSelf();
     }
 }