[Keyboard] added ASH-XIIX keyboard (#9833)
* Create readme.md
* Update readme.md
* Update readme.md
* Create ash_xiix.c
* Create ash_xiix.h
* Create info.json
* Create config.h
* Create rules.mk
* Create keymap.c
* Update keyboards/ash_xiix/rules.mk
* Update keyboards/ash_xiix/config.h
* Update keyboards/ash_xiix/config.h
* Update keyboards/ash_xiix/config.h
* Update keyboards/ash_xiix/info.json
* Update keyboards/ash_xiix/info.json
* Update keyboards/ash_xiix/readme.md
* Update readme.md
* Update readme.md