[Keyboard] Blackplum a.k.a IMKG68 - new 68% mechanical keyboard (#7122)
* Add blackplum firmware
blackplum firmware
* Delete blackplum.c
* Delete blackplum.h
* Delete config.h
* Delete info.json
* Delete rules.mk
* Delete keymap.c
* Update readme.md
* Delete readme.md
* Add Blackplum
* Add image: blackplum layout
* Update readme.md
* Update readme.md
* remove _WINLCK layer, replaced with custom_keycodes
* change #define LAYOUT_68 to #define LAYOUT_68_ansi
* change DEBOUNCING_DELAY to DEBOUNCE, remove IS_COMMAND()
* change keyboard_name, maintainer, url, width height
* change some comments
* Update readme
* LAYOUTS = 68_ansi
* update layout_68_ansi
* Change LAYOUT_68 to LAYOUT_68_ansi
Co-Authored-By: fauxpark <fauxpark@gmail.com>
* Fix Bug
* remove extern keymap_config_t keymap_config;
* Update config.h
* Update config.h
* Update config.h
* Update keyboards/blackplum/rules.mk
Co-Authored-By: fauxpark <fauxpark@gmail.com>
* Update rules.mk
* Update rules.mk
* Update readme.md
* Update readme.md
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