Merge remote-tracking branch 'origin/master' into develop

Unbreak switchplate/southpaw_65 after #16277 (#20015)

Apparently the changes done in #16277 swapped the values read from the
PCA9555 expanders by mistake, which resulted in mixed up matrix columns.
Fix the chip and register addresses to match the original code.

Merge remote-tracking branch 'origin/master' into develop

Add Keychron Q12 (#19844)

Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>

Merge remote-tracking branch 'origin/master' into develop

Add Support for Lilly58 r2g (#19862)

* Add support for lilly58 r2g by Mechboards

Merge remote-tracking branch 'origin/master' into develop

Add new keymap for Preonic rev3 (#19706)

Remove some use of keymap.h (#20006)

Remove some use of keymap.h (#19980)

Merge remote-tracking branch 'origin/master' into develop

Initial deprecation policy documentation. (#19908)

Remove Vagrant due to bit-rot. (#20000)

Update branch names to reflect configurator's new deployment. (#19999)

Merge upstream changes to uf2conv (#19993)

Merge remote-tracking branch 'origin/master' into develop

Check all keys have matrix positions when parsing C LAYOUT macros (#19781)

Merge remote-tracking branch 'origin/master' into develop

[Keyboard] Clean up contra & move to data-driven (#19973)

Co-authored-by: Joel Challis <git@zvecr.com>

Merge remote-tracking branch 'origin/master' into develop