adding in some needed packages

Assets/Bremsengine/Faction/IFaction.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Bremsengine
+{
+    public enum BremseFaction
+    {
+        None = 0,
+        Player = 1,
+        Enemy = 2
+    }
+    public interface IFaction
+    {
+        public BremseFaction Faction { get; protected set; }
+        public bool IsOfFaction(BremseFaction f)
+        {
+            if (f == Faction)
+            {
+                return true;
+            }
+            return false;
+        }
+        public bool CompareFaction(BremseFaction f)
+        {
+            if (f == BremseFaction.None)
+            {
+                return true;
+            }
+            return IsOfFaction(f);
+        }
+        public void SetFaction(BremseFaction f) => Faction = f;
+    }
+}

Assets/Bremsengine/Faction/IFaction.cs.meta

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