Add corne keyboard (#3119)
* Fork from helix
* Move rev2 to rev1
* Remove unused settings
* Move split_util to outof rev
* Setup KEYMAP for crkbd
* Remove old image
* Move keymaps directory and glcdfont.c
* Remove AUDIO in keymap
* Show keylog
* Show keylogs
* Show time log
* Remove EISU/KANA
* Use KEYMAP_kc
* Remove iota_gfx_record_user wrapping
* Remove unused settings for layer
* Add keylogger.c
* Fix uppercase letters to lower
* Add timelogger.c
* Default RGBLED_NUM = 27
* Remove unused setting
* Add mode icon reader
* Add matrix_write_ln
* Add layer_state_reader
* Move to lib directory
* Rename functions
* Add host_led_state_reader
* Add logo_reader
* Cleaning of iota_gfx_task
* Fix bugs and add key defines
* Remove unnecessary comments
* Update crkbd readme
* Move libs to lib directories
* Rename KEYMAP to LAYOUT
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