Implement AbilityManager

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

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+package emu.grasscutter.data.custom;
+
+import java.util.Map;
+
+public class AbilityModifier {
+	public AbilityModifierAction[] onAdded;
+	public AbilityModifierAction[] onThinkInterval;
+	public AbilityModifierAction[] onRemoved;
+
+	public static class AbilityConfigData {
+		public AbilityData Default;
+	}
+	
+	public static class AbilityData {
+		public String abilityName;
+		public Map<String, AbilityModifier> modifiers;
+	}
+	
+	public static class AbilityModifierAction {
+		public String $type;
+		public AbilityModifierActionType type;
+		public String target;
+		public AbilityModifierValue amount;
+		public AbilityModifierValue amountByTargetCurrentHPRatio;
+	}
+	
+	public static class AbilityModifierValue {
+		public boolean isFormula;
+		public boolean isDynamic;
+		public String dynamicKey;
+	}
+	
+	public enum AbilityModifierActionType {
+		HealHP, ApplyModifier, LoseHP;
+	}
+}

src/main/java/emu/grasscutter/data/custom/AbilityModifierEntry.java

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+package emu.grasscutter.data.custom;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import emu.grasscutter.data.custom.AbilityModifier.AbilityModifierAction;
+
+public class AbilityModifierEntry {
+	private String name; // Custom value
+	public List<AbilityModifierAction> onModifierAdded;
+	public List<AbilityModifierAction> onThinkInterval;
+	public List<AbilityModifierAction> onRemoved;
+	
+	public AbilityModifierEntry(String name) {
+		this.name = name;
+		this.onModifierAdded = new ArrayList<>();
+		this.onThinkInterval = new ArrayList<>();
+		this.onRemoved = new ArrayList<>();
+	}
+	
+	public String getName() {
+		return name;
+	}
+
+	public List<AbilityModifierAction> getOnAdded() {
+		return onModifierAdded;
+	}
+
+	public List<AbilityModifierAction> getOnThinkInterval() {
+		return onThinkInterval;
+	}
+
+	public List<AbilityModifierAction> getOnRemoved() {
+		return onRemoved;
+	}
+	
+}