feat(scripting): add mono csharp runtime foundation

managed/XCEngine.ScriptCore/Vector3.cs

@@ -0,0 +1,37 @@
+using System.Runtime.InteropServices;
+
+namespace XCEngine
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Vector3
+    {
+        public float X;
+        public float Y;
+        public float Z;
+
+        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 Vector3(float x, float y, float z)
+        {
+            X = x;
+            Y = y;
+            Z = z;
+        }
+    }
+}