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

[Keyboard] Fix Clawsome/Sedan matrix and default keymap (#13007)

Document LED_MATRIX_FRAMEBUFFER_EFFECTS (#12987)

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

Document RGB_MATRIX_FRAMEBUFFER_EFFECTS (#12984)

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

[Keyboard] Removed LAYOUTS = ortho_6x16 (#12983)

Removed ortho_6x16 community layout support by commenting out the line.

This can be reversed if that layout ever gets added.

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

[Keymap] Add new keymap for ut472 (#12974)

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

[Keymap] Add mercutio keymap and update readme.md for layouts (#12973)

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

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

[Keyboard] Add RGB Matrix support for Bear65 PCB (#12961)

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

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

[Keyboard] Adjustments to Gust Rev1.2 (#12716)

Co-authored-by: Eithan Shavit <eithan@afternoonlabs.com>

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

[Keyboard] SKErgo (#12923)

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

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

[Keymap] update gunp layout for Planck (#12926)

Co-authored-by: Ryan <fauxpark@gmail.com>

Add Full-duplex serial driver for ARM boards (#9842)