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

[Keyboard] Add Skelett60 (#23409)

Co-authored-by: yiancar <yiancar@gmail.com>
Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Duncan Sutherland <dunk2k_2000@hotmail.com>

Migrate build target markers to keyboard.json - YZ (#23421)

Rename `process_{led,rgb}_matrix()` (#23422)

Remove more unnecessary `quantum.h` includes (#23402)

Update ChibiOS submodules. (#23405)

"features.split" is not a valid key (#23419)

Tidy up keyboards/zvecr (#23418)

Remove deprecated quantum keycodes (#23407)

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

Fix malformed JSON in `layouts/default/ortho_5x10/info.json` (#23414)

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

Fix pointing_device_set_cpi_on_side() (#23391)

Co-authored-by: Less/Rikki <86894501+lesshonor@users.noreply.github.com>

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

handwired/technicpad: fix `keyboard` in keymaps (#23408)

Miscellaneous keyboard.json migrations (#23378)

Fix failing keyboards on develop (#23406)

Remove `quantum.h` includes from keyboard code (#23394)

Change the VID and PID of the file kb38 info.json (#23393)

Fix spaceholdings/nebula68b (#23399)