Implement emotions

Assets/Battle/CardsHeroes/EagernessHCard.cs

@@ -0,0 +1,17 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class EagernessHCard : HeroCard
+{
+    public EagernessHCard(BattleParticipant owner)
+        : base(owner, HCardId.Eagerness, "Eagerness", 0, CardType.Emotion,
+            "1 Energy") {
+    }
+
+    public override IEnumerator Use(IBattleEffectApplier effectApplier,
+            MonsterViewpoint viewpoint, BattlePlayerControls playerControls) {
+        effectApplier.Apply(new DropEmotionEffect(1, this.owner.Team));
+        yield break;
+    }
+}