[Keyboard] Add FoldKB (#12255)

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

keyboards/keebio/foldkb/rev1/config.h

@@ -0,0 +1,58 @@
+/* Copyright 2021 Danny Nguyen <danny@keeb.io>
+
+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
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0xCB10
+#define PRODUCT_ID      0x1258
+#define DEVICE_VER      0x0100
+#define MANUFACTURER    Keebio
+#define PRODUCT         FoldKB Rev. 1
+
+/* key matrix size */
+// Rows are doubled-up
+#define MATRIX_ROWS 10
+#define MATRIX_COLS 8
+
+#define DIODE_DIRECTION COL2ROW
+// wiring of each half
+#define MATRIX_ROW_PINS { B1, B2, C7, B4, D7 }
+#define MATRIX_COL_PINS { F4, F1, F0, B7, B3, D2, D3, D5 }
+#define SPLIT_HAND_PIN F7
+#define ENCODERS_PAD_A { F5 }
+#define ENCODERS_PAD_B { F6 }
+
+/* Set 0 if debouncing isn't needed */
+#define DEBOUNCE 5
+
+#define BACKLIGHT_PIN B5
+
+/* serial.c configuration for split keyboard */
+#define SOFT_SERIAL_PIN D0
+
+/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
+#define LOCKING_SUPPORT_ENABLE
+/* Locking resynchronize hack */
+#define LOCKING_RESYNC_ENABLE
+
+/* ws2812 RGB LED */
+#define RGB_DI_PIN E6
+#define RGBLIGHT_ANIMATIONS
+#define RGBLED_NUM 16    // Number of LEDs
+#define RGBLED_SPLIT { 8, 8 }
+#define RGBLIGHT_LED_MAP { 0, 1, 2, 3, 12, 13, 14, 15, 4, 5, 6, 7, 8, 9, 10, 11 }
+#define RGBLIGHT_DEFAULT_MODE (RGBLIGHT_MODE_RAINBOW_SWIRL + 2)