Keyboard: Add new keyboard Zinc (#4245)
* Add Zinc keyboard
* Fix photo
* Fix readme.md
* Fix RGB LED init of monks/keymap.c
* Fix default keymap and readme.jp
* Fix change DEFS of RGB ANIMATIONS to LED_ANIMATIONS
* Add EOL
* Use serial_config_simpleapi.h
* Fix comment char
* Fix error handling in split_scomm.c : mtei works
* Fix keymaps
* Remove DISABLE_LEADER definition
* Remove pro_micro.h
* Add 2 spaces after Hardware name
* Fix keymaps
- remove audio codes
- change LAYOUT to LAYOUT_ortho_4X12
- change "persistent_default_layer_set" to core function
* Use the Community Layouts feature
- with some clean up
23cd9f4dee