Split Enums, Structs & Classes into own files

Raylib-cs/MaterialMap.cs

@@ -0,0 +1,26 @@
+using System.Runtime.InteropServices;
+
+namespace Raylib_cs
+{
+    /// <summary>
+    /// Material texture map
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential)]
+    public struct MaterialMap
+    {
+        /// <summary>
+        /// Material map texture
+        /// </summary>
+        public Texture2D texture;
+
+        /// <summary>
+        /// Material map color
+        /// </summary>
+        public Color color;
+
+        /// <summary>
+        /// Material map value
+        /// </summary>
+        public float value;
+    }
+}