Add QuadrumLabs Delta

[Sleepdealr]

This replaces #18198 because lfg went AWOL

I had to remake this from the gerbers and it was awful

Description

Adds QuadrumLabs Delta to QMK

Types of Changes

• Core
• Bugfix
• Enhancement/optimization
• New feature
• Keyboard (addition or update)
• Keymap/layout/userspace (addition or update)
• Documentation

Issues Fixed or Closed by This PR

Checklist

• My code follows the code style of this project: C, Python
• I have read the PR Checklist document and have made the appropriate changes.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).

[zvecr]

keyboards/quadrum/delta/keymaps/default/rules.mk should be added with just ENCODER_MAP_ENABLE = yes

Submodule changes must also be reverted before this PR can be accepted.

[Sleepdealr]

How can I remove the lib stuff from it? Every time I commit it seems to include it for whatever reason

[waffle87]

How can I remove the lib stuff from it? Every time I commit it seems to include it for whatever reason

git checkout develop
make git-submodule
git submodule foreach 'git log -n1 --oneline'
# remember the first abcdef1234 on the submodules that have an issue
git checkout @@your-branch@@
# for each of the problematic repo's:
cd lib/@@name@@
git checkout abcdef1234
cd @@qmk_firmware@@
git commit -m 'Resync submodules'

[Sleepdealr]

Fixed, thanks @waffle87!

[sigprof]

Layouts need some work — apparently what you have here is LAYOUT_all (unbuildable as it is, because ANSI backslash is separate from ISO NUHS on this PCB, therefore you need to use 1.25u Enter to make all matrix positions assignable), but a lone LAYOUT_all is not allowed by the rules, so you would need to add at least LAYOUT_ansi and LAYOUT_iso with appropriate modifications. (Maybe you should also provide layout variations for 2u Backspace, but you would need to check which matrix location corresponds to the 2u position.)