[Keymap] Add keymap for Nyquist rev3 (#8706)

* copy nyquist setup

* enable i2c

* update colors

* update readme

* Update keyboards/keebio/nyquist/keymaps/georgepetri3/keymap.c

Co-Authored-By: Joel Challis <git@zvecr.com>

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

keyboards/keebio/nyquist/keymaps/georgepetri3/config.h

@@ -0,0 +1,25 @@
+/*
+Copyright 2017 Danny Nguyen <danny@hexwire.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
+
+#define RGBLIGHT_LAYERS
+
+#define TAPPING_TOGGLE 2
+#define TAPPING_TERM 150
+
+#define USE_I2C