* Port DIRECT_PINS from split_common/matrix.c to matrix.c
* Reorder matrix.c to remove foward declaration and match split_common/matrix.c
* Refactor nano to use DIRECT_PINS
* Reorder matrix.c to remove foward declaration and match split_common/matrix.c
* Add DIRECT_PINS documentation
* Reorder matrix.c to remove foward declaration and match split_common/matrix.c - fix logic from inherited from split_common
* Add DIRECT_PINS documentation - review comments
* add breathing to bananasplit
* backlight breathing overhaul
* fix the backlight_tick thing.
* fix for vision_division backlight
* fix a few keymaps and probably break breathing for some weirdly set-up boards.
* remove BL_x keycodes because they made unreasonable assumptions
* some fixes for BL keycodes
* integer cie lightness scaling
* use cie lightness for non-breathing backlight and make breathing able to reach true max brightness