Add UTD80 PCB (#11799)

* Create readme.md

* Add files via upload

* Create readme.md

* Add files via upload

* Update utd80.h

* Update utd80.c

* Update keymap.c

Change 6 length underscore to 7.

* Update keyboards/utd80/readme.md

Co-Authored-By: Drashna Jaelre <drashna@live.com>

* Update keyboards/utd80/readme.md

Co-Authored-By: Drashna Jaelre <drashna@live.com>

* Update keyboards/utd80/readme.md

Co-Authored-By: Drashna Jaelre <drashna@live.com>

* Update keyboards/utd80/readme.md

Co-Authored-By: fauxpark <fauxpark@gmail.com>

* Update keyboards/utd80/readme.md

Co-Authored-By: fauxpark <fauxpark@gmail.com>

* Update utd80.c

* Update utd80.c

* Update keymap.c

* Apply #7701 PR review suggestions

* Add GPL license headers

* Replace led implementation with definition

* Add VIA keymap for UTD80

* Update attributions

Co-authored-by: UTDKeyboard <59077857+utdkeyboard@users.noreply.github.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: fauxpark <fauxpark@gmail.com>

keyboards/utd80/utd80.c

@@ -0,0 +1,16 @@
+/* Copyright 2021 UTDKeyboard & Dominic Gan
+ * 
+ * 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 "utd80.h"