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

[Keyboard] Fix frosty_flake LED pin assignment (#16000)

4c080be seemed to swap the LED pins for the 20130602 and 20140521
variants. 20140521 is fine now, 20130602 untested but per the
schematics at https://deskthority.net/wiki/Costar_replacement_controllers
it seems correct.

Default EEPROM implementation should be transient when not implemented. Removed the equivalent eeprom_teensy fallback. (#16020)

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

RGB matrix effects definiton fix (#15930)

* RGB matrix effects definiton fix

* Move LTO to board rules & add some comments

* Whitespace fix

* Whitespace fix 2

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

* Whitespace fix 3

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

* Comment fix

Co-authored-by: Dasky <32983009+daskygit@users.noreply.github.com>

Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Dasky <32983009+daskygit@users.noreply.github.com>

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

DZ60 - QMK Configurator fix for ISO DE Arrow layout (#15941)

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

Add some clarity regarding new board definitions (#16018)

Add L432, L442. (#16016)

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

[Keymap] Remove Ergodox community layout “coderkun_neo2” (#16011)

[Keyboard] Fixed RGB number for Devil68 Pro (#16003)

[Keyboard] Fix erroneous SRC for Clueboard 66 hotswap (#16007)

Relocate matrix_init_quantum content (#15953)

* Relocate matrix_init_quantum content

* Update include order

* Fix cherry pick from 15722

[Bug] Fix compilation issues for led indicators (#16001)

Fix BACKLIGHT_CAPS_LOCK warning (#15999)

* Fix BACKLIGHT_CAPS_LOCK warning

* align defs

Align location of some host led logic (#15954)

* Align location of host led logic

* Move more

* align ifdefs

* Fix up includes

* Move callback defs

* Convert comment to build message

`rocketboard_16`: Fix mismatched LUT sizes (#15997)

Remove `action_function()` from LFKeyboards boards (#15993)