feat(scripting): add mono csharp runtime foundation

managed/XCEngine.ScriptCore/Vector4.cs

@@ -0,0 +1,45 @@
+using System.Runtime.InteropServices;
+
+namespace XCEngine
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Vector4
+    {
+        public float X;
+        public float Y;
+        public float Z;
+        public float W;
+
+        public float x
+        {
+            get => X;
+            set => X = value;
+        }
+
+        public float y
+        {
+            get => Y;
+            set => Y = value;
+        }
+
+        public float z
+        {
+            get => Z;
+            set => Z = value;
+        }
+
+        public float w
+        {
+            get => W;
+            set => W = value;
+        }
+
+        public Vector4(float x, float y, float z, float w)
+        {
+            X = x;
+            Y = y;
+            Z = z;
+            W = w;
+        }
+    }
+}