Marlin 9-axis for OpenPnP

I modify the code to get up to 9-axis to using my BTT GTR v1.0 + M5 Board for OpenPnP Project

Name		Name	Last commit message	Last commit date
Latest commit History 2 Commits
.github		.github
Marlin		Marlin
buildroot		buildroot
data/www		data/www
docker		docker
docs		docs
.editorconfig		.editorconfig
.gitattributes		.gitattributes
.gitignore		.gitignore
LICENSE		LICENSE
Makefile		Makefile
README.md		README.md
docker-compose.yml		docker-compose.yml
get_test_targets.py		get_test_targets.py
platformio.ini		platformio.ini
process-palette.json		process-palette.json

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