Implement DebugLog ability action

src/main/java/emu/grasscutter/data/binout/AbilityModifier.java

@@ -346,6 +346,8 @@ public enum Type {
         public int[] callParamList;
         public String funcName;
 
+        public String content;
+
         public enum LuaCallType {
             FromGroup,
             CurGalleryControlGroup,

src/main/java/emu/grasscutter/game/ability/actions/ActionDebugLog.java

@@ -0,0 +1,19 @@
+package emu.grasscutter.game.ability.actions;
+
+import com.google.protobuf.ByteString;
+import emu.grasscutter.Grasscutter;
+import emu.grasscutter.data.binout.AbilityModifier.AbilityModifierAction;
+import emu.grasscutter.game.ability.Ability;
+import emu.grasscutter.game.entity.GameEntity;
+
+@AbilityAction(AbilityModifierAction.Type.DebugLog)
+public final class ActionDebugLog extends AbilityActionHandler {
+    @Override
+    public boolean execute(
+            Ability ability, AbilityModifierAction action,
+            ByteString abilityData, GameEntity target
+    ) {
+        Grasscutter.getLogger().debug("[Ability] DebugLog: {}", action.content);
+        return true;
+    }
+}