handle modules larger than 1x1, widen door size to allow walking around it

Assets/Engine/Runtime/Utilities/Range.cs

@@ -0,0 +1,17 @@
+namespace EscapeRoomEngine.Engine.Runtime.Utilities
+{
+    public struct Range
+    {
+        public int min, max;
+
+        public int Length => max - min;
+
+        public Range(int min, int max)
+        {
+            this.min = min;
+            this.max = max;
+        }
+
+        public override string ToString() => $"{{{min}, ..., {max}}}";
+    }
+}