[Keyboard] Box75 (#10949)

* Initial BOX75 PCB v1.0.6 PCB support

* New prototype firmware

* Correct column pin assignment

* Update README

* Update keyboards/box75/config.h

Remove USB description

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

* Update keyboards/box75/rules.mk

Remove comment lines from BLUETOOTH_ENABLE and AUDIO_ENABLE

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

* Add VIA support

* Remove KC_NO define and use traditional one

* Update keyboards/box75/keymaps/default/keymap.c

Move KC_HOME location on keymap.c

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

* Update keyboards/box75/box75.h

Move HOME key location on keymap.c

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

* Changed F13 to print screen in default VIA firmware

Co-authored-by: Gondolindrim <alvaro.augusto.volpato@gmail.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

keyboards/box75/box75.c

@@ -0,0 +1,18 @@
+/*
+Copyright 2020 Álvaro "Gondolindrim" Volpato  <gondolindrim@acheronproject.com>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "box75.h"