Implement TargetingPolicy, Cover can only target other allies

Assets/Battle/Targeting/AnyTargetPolicy.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class AnyTargetPolicy: TargetingPolicy
+{
+    public override bool CanTarget(BattleParticipant participant) {
+        return true;
+    }
+}

Assets/Battle/Targeting/AnyTargetPolicy.cs.meta

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Assets/Battle/Targeting/OtheHeroTargetPolicy.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class OtherHeroTargetPolicy: TargetingPolicy
+{
+    private BattleParticipant owner;
+
+    public OtherHeroTargetPolicy(BattleParticipant owner) {
+        this.owner = owner;
+    }
+
+    public override bool CanTarget(BattleParticipant participant) {
+        return participant.IsHero() && participant != this.owner;
+    }
+}

Assets/Battle/Targeting/OtheHeroTargetPolicy.cs.meta

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Assets/Battle/Targeting/SingleTargeting.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UI;
+
+public class SingleTargeting
+{
+    private TargetingPolicy targetingPolicy;
+    private BattleParticipant participantClicked;
+    
+    public SingleTargeting(TargetingPolicy targetingPolicy) {
+        this.targetingPolicy = targetingPolicy;
+    }
+
+    public bool CanTarget(BattleParticipant participant) {
+        return this.targetingPolicy.CanTarget(participant);
+    }
+    
+    public IEnumerator ChooseTarget() {
+        while (this.participantClicked == null) {
+            yield return null;
+        }
+    }
+
+    public void NotifyParticipantSpriteClicked(BattleParticipant paticipant) {
+        this.participantClicked = paticipant;
+    }
+
+    public BattleParticipant GetTarget() {
+        return this.participantClicked;
+    }
+}

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Assets/Battle/Targeting/TargetingPolicy.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public abstract class TargetingPolicy
+{
+    public abstract bool CanTarget(BattleParticipant participant);
+}

Assets/Battle/Targeting/TargetingPolicy.cs.meta

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