wip -- marshal UTF16 string from C# to Rust to avoid GC in C#

csharp_mod/Marshal.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Text;
+using StationeersIC10Editor;
+
+namespace Slang
+{
+    public static class Marshal
+    {
+        public static unsafe Line TokenizeLine(string input)
+        {
+            if (String.IsNullOrEmpty(input))
+            {
+                return new Line();
+            }
+
+            // Make sure the string is a null terminated string
+            if (input[input.Length - 1] != '\0')
+            {
+                input += '\0';
+            }
+
+            var strBytes = Encoding.UTF8.GetBytes(input);
+
+            fixed (byte* ptrString = strBytes)
+            {
+                return Ffi.tokenize_line(ptrString).AsList();
+            }
+        }
+    }
+}