[Keyboard] 45-ATS (#10104)
* add ats folder
* fix duplicate matrix key
* fix matrix issues
* fix missing comma in info.json
* clean up info.json
* rm game layer toggle in via keymap
* update via keymap rules.mk
* Update info.json
* clear up layout graphics
* Apply suggestions from code review
* Update 45_ats.c
* Update 45_ats.h
* Update config.h
* Update config.h
* Update keyboards/45_ats/keymaps/default/config.h
* Update keymap.c
* Update keyboards/45_ats/keymaps/default/keymap.c
* Update keymap.c
* Update keyboards/45_ats/keymaps/via/keymap.c
* Apply suggestions from code review
* Update keyboards/45_ats/config.h
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