Add VIA keymap for Plaid-Pad (#10057)

* Add via keymap for Plaid-Pad

- Add VIA support for the Plaid-Pad
- Changes Vendor ID and Product ID (to follow VIA's guidelines)

* Add extra encoder pads for rev1.1

* Change Product Id from pp to PP (hex value)

* improved readme

- detailed informations about rotary encoder, bootloader and firmware

* Improved encoder informations in via keymap

* Improved encoder infos and code in default keymap

* add revision folder for rev1 and rev1.1

* change encoder assignment for defaul a via keymap

* Update keyboards/keycapsss/plaid_pad/config.h

* change revision number

* Update keyboards/keycapsss/plaid_pad/rules.mk

* Update keyboards/keycapsss/plaid_pad/rules.mk

* Update keyboards/keycapsss/plaid_pad/rules.mk

* Update keyboards/keycapsss/plaid_pad/rules.mk

* Update keyboards/keycapsss/plaid_pad/readme.md

* add license to header of *.h and *.c files

* remove the list of alternate bootloaders

- due to the pr checklist

* Update keyboards/keycapsss/plaid_pad/rules.mk

keyboards/keycapsss/plaid_pad/keymaps/default/config.h

@@ -1,3 +1,19 @@
+/* Copyright 2020 Ben Roesner (keycapsss.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/>.
+ */
+
 #pragma once
 
 // place overrides here