Split Enums, Structs & Classes into own files

Raylib-cs/Rectangle.cs

@@ -0,0 +1,24 @@
+using System.Runtime.InteropServices;
+
+namespace Raylib_cs
+{
+    /// <summary>
+    /// Rectangle type
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Rectangle
+    {
+        public float x;
+        public float y;
+        public float width;
+        public float height;
+
+        public Rectangle(float x, float y, float width, float height)
+        {
+            this.x = x;
+            this.y = y;
+            this.width = width;
+            this.height = height;
+        }
+    }
+}