more commands, change display communication to new lib

DisplayCommands/Internals/HeaderBitmap.cs

@@ -0,0 +1,17 @@
+using System.Runtime.InteropServices;
+
+namespace DisplayCommands.Internals;
+
+[StructLayout(LayoutKind.Sequential, Pack = 16, Size = 10)]
+internal struct HeaderBitmap
+{
+    public DisplayCommand Command;
+
+    public ushort Offset;
+
+    public ushort Length;
+
+    public DisplaySubCommand SubCommand;
+
+    public ushort Reserved;
+}