Added new class AbilityEntity.

MrBigsock/Assets/Code/Core/Abilities/Base/AbilityEntity.cs

+using System.Collections;
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.InputSystem;
+
+
+namespace BigSock {
+	/*
+		An object representing an ability held by a player.
+	*/
+	class AbilityEntity {
+
+		// The ability held in this slot.
+		public IAbility Ability { get; }
+
+		// The index of the ability
+		public int Index { get; }
+
+		// The time this ability started charging.
+		public float ChargeStarted { get; }
+
+		// The keys bound to this ability.
+		public List<KeyCode> Keys { get; set; }
+
+
+
+
+		public AbilityEntity(IAbility ability, int index, List<KeyCode> keys = null) {
+			if(ability == null) throw new ArgumentNullException(nameof(ability));
+
+			keys ??= new List<KeyCode>();
+
+			Ability = ability;
+			Index = index;
+		}
+	}
+}