Clean up RGB LED type (#21859)

[Core] Allow customizing PWM frequency (#21717)

* [Core] Allow customizing PWM frequency

Some frequencies can cause audible noise. Changing the frequency
eliminates that.

Signed-off-by: Daniel Schaefer <dhs@frame.work>

* docs/feature-backlight: Mention PWM frequency

Signed-off-by: Daniel Schaefer <dhs@frame.work>

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Signed-off-by: Daniel Schaefer <dhs@frame.work>

Merge branch 'develop'

Breaking changes changelog, 2023q3 version (#21848)

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>
Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: honorless <86894501+lesshonor@users.noreply.github.com>

Unicode, Unicodemap and UCIS refactor (#21659)

Rework info.json reference (#21324)

* Rework info.json reference

* Apply suggestions from code review

Co-authored-by: Sergey Vlasov <sigprof@gmail.com>

* Update backlight.pins description

* Add rgblight.driver and lowercase other driver names

* Remove `split.main` and `split.matrix_grid` for now as they are not working yet

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Co-authored-by: Sergey Vlasov <sigprof@gmail.com>

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

Corrected duration example, should be number not string (#21839)

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

[Doc] Improve magic keycode section (#21787)

RGB Matrix: driver naming cleanups (#21594)

Simplfy RGB/LED matrix effect logic (#21703)

rgblight: driver selection cleanups (#21558)

OLED: driver naming cleanups (#21710)

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

Contributing docs: add note to make sure repo is up to date (#21694)

haptic: further naming cleanups (#21682)

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

Clarify custom keycode enum requirement for PRs (#21648)

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