feat: better state handling for combat

melee weapon now spawns in hand
melee substate cleaned up to work with above
added new playerinventory script on player
added new playeranimation script on player
changed inventory to IInventory
animations tweaked to avoid a lockout

Assets/Scripts/Units/PlayerAnimation.cs

@@ -0,0 +1,8 @@
+using UnityEngine;
+
+namespace Reset.Units{
+    public class PlayerAnimation : UnitAnimation{
+        public Transform rightHand;
+        public Transform leftHand;
+    }
+}