[Keyboard] Add doio KB19 (#22393)

* Add files via upload

* Update keyboards/doio/kb3x/config.h

Co-authored-by: Joel Challis <git@zvecr.com>

* Update keyboards/doio/kb3x/info.json

Co-authored-by: Joel Challis <git@zvecr.com>

* Update keyboards/doio/kb3x/keymaps/via/keymap.c

Co-authored-by: Joel Challis <git@zvecr.com>

* Update keyboards/doio/kb3x/config.h

Co-authored-by: adophoxia <100170946+adophoxia@users.noreply.github.com>

* Update keyboards/doio/kb3x/keymaps/default/keymap.c

Co-authored-by: Joel Challis <git@zvecr.com>

* Update rules.mk

* Update info.json

* Update keyboards/doio/kb3x/info.json

Co-authored-by: Duncan Sutherland <dunk2k_2000@hotmail.com>

* Update keyboards/doio/kb3x/rules.mk

Co-authored-by: adophoxia <100170946+adophoxia@users.noreply.github.com>

* Add files via upload

* Update keyboards/doio/kb3x/info.json

Co-authored-by: Duncan Sutherland <dunk2k_2000@hotmail.com>

* Update keyboards/doio/kb3x/config.h

Co-authored-by: Duncan Sutherland <dunk2k_2000@hotmail.com>

* Delete keyboards/doio/kb3x/rules.mk

* Update keyboards/doio/kb3x/keymaps/default/keymap.c

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Update keyboards/doio/kb3x/keymaps/via/keymap.c

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Add KB19

* Delete keyboards/doio/kb3x directory

* format  info.json

* format info.json

* Create rules.mk

* Update rules.mk

* Update keyboards/doio/kb19/config.h

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update info.json

* Update keymap.c

* Update keymap.c

* Delete keyboards/doio/kb19/config.h

* Update keyboards/doio/kb19/keymaps/via/keymap.c

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Update keyboards/doio/kb19/keymaps/default/keymap.c

Co-authored-by: Drashna Jaelre <drashna@live.com>

---------

Co-authored-by: Joel Challis <git@zvecr.com>
Co-authored-by: adophoxia <100170946+adophoxia@users.noreply.github.com>
Co-authored-by: Duncan Sutherland <dunk2k_2000@hotmail.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Ryan <fauxpark@gmail.com>

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