Remove deprecated Quantum keycodes (#19712)

Fix 19701 merge

Fix quantum ring_buffer for ChibiOS (#19683)

Split out mcu_selection to platform (#19701)

Remove commented out backlight config & stray "backlight levels" (#19703)

fix pegasushoof caps light, add via keymap (#19649)

Co-authored-by: jack <0x6a73@protonmail.com>
Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Fucong Wang <wangfuco@Fucongs-Mac-mini.local>

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

new keyboard: edinburgh41 (#19569)

* added edinburgh41

Co-authored-by: Joel Challis <git@zvecr.com>
Co-authored-by: jack <0x6a73@protonmail.com>
Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>

analog.c: Fix `pinToMux()` for STM32F0xx (#19658)

The `adc_read()` code for STM32F0xx expects to get the 0-based channel
number in `mux.input`, but the `pinToMux()` code for STM32F0xx was
attempting to pass the CHSELR bit mask in that field, which resulted in
selecting a wrong channel, therefore `analogReadPin()` did not work
properly for the STM32F0xx chips.  Fix `pinToMux()` to put the channel
number in that field (this matches the behavior for other supported
chips and also allows selection of channels 16...18, which can be used
to access the builtin temperature, reference voltage and VBAT sensors).

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

Decrease LED animation frequency to improve performance (#19677)

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

[Keymap] Update brauner preonic layout (#19665)

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

Update understanding_qmk.md (#19664)

Changed "...4 row by 5 column numpad" to "...5 row by 4 column numpad" on line 46.

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

escaped stray backslash in bux.py (#19667)

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

[Keyboard] Add the Black Hellebore (#19655)

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