Klipper M600 code

My first working version of macros that simulate the M600 Gcode command in Klipper.

The file M600 Gcode contains just the code to handle the M600 command.
Let me know if you need more information on how it works, I have tried to add lots of comments.

The file plus M600 V 1 printer.cfg is the complete printer.cfg for my Creality Ender 5 Plus.

I'm running Klipper and Fluidd as the front end. Works great and almost any Raspberry Pi will run it.
This is customized for a BTT SKR mini E3 v2, but there are presets for almost any printer board.