[Keyboard] Add Plaid-Pad Rev3 and oled keymap (#12464)

Co-authored-by: Erovia <Erovia@users.noreply.github.com>

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

@@ -0,0 +1,22 @@
+/* Copyright 2021 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
+#define OLED_FONT_H "keyboards/keycapsss/plaid_pad/keymaps/oled/glcdfont.c"
+
+#define COMBO_COUNT 3