retract/recover gcode tuning script

[petaflot]

follow-up to https://github.com/MarlinFirmware/MarlinDocumentation/pull/562#issuecomment-2271483980

URLs were fixed

[thisiskeithb]

I've rebased this PR to bring it up to date with current master & resolved merge conflicts, so please update your local copy with the following before pushing additional commits:

git checkout jczd
git fetch origin
git reset --hard origin/jczd

[petaflot]

I've rebased this PR to bring it up to date with current master & resolved merge conflicts, so please update your local copy with the following before pushing additional commits:

git checkout jczd
git fetch origin
git reset --hard origin/jczd

thanks a lot, @thisiskeithb

unfortunately I have a problem here...

$ git reset --hard origin/jczd
fatal: ambiguous argument 'origin/jczd': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'

maybe you can help (again)?

[petaflot]

ps: I fully agree on the changes you have made :-)

[thisiskeithb]

maybe you can help (again)?

If you were able to run the previous two commands, then git reset --hard origin/jczd should have worked. I just tested it on my machine (using the petaflot remote instead of origin) and it worked 🤷

What does git remote -v report?

edit: I also fixed some typos & punctuation in a3e046c.

[thisiskeithb]

@petaflot: It looks like you've undone some upstream changes & merged in changes from your other PR: https://github.com/MarlinFirmware/MarlinDocumentation/pull/543, so this ends up changing a lot more than a single file.