replace v6 with experimental v7 code

src/MpvNet/Help/ProcessHelp.cs

@@ -0,0 +1,15 @@
+namespace MpvNet.Help;
+
+public static class ProcessHelp
+{
+    public static void Execute(string file, string arguments = "", bool shellExecute = false)
+    {
+        using Process proc = new Process();
+        proc.StartInfo.FileName = file;
+        proc.StartInfo.Arguments = arguments;
+        proc.StartInfo.UseShellExecute = shellExecute;
+        proc.Start();
+    }
+
+    public static void ShellExecute(string file, string arguments = "") => Execute(file, arguments, true);
+}