[Keyboard] Add ymd67 keyboard (#7631)

* [Keyboard] Add ymd67 keyboard

* Apply suggestions from code review

* Apply more suggestions from code review

keyboards/ymdk/ymd67/config.h

@@ -0,0 +1,46 @@
+#pragma once
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0xFEED
+#define PRODUCT_ID      0x6060
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    YMDK
+#define PRODUCT         YMD67
+#define DESCRIPTION     Keyboard
+
+/* key matrix size */
+#define MATRIX_ROWS 5
+#define MATRIX_COLS 15
+
+/* key matrix pins */
+#define MATRIX_ROW_PINS { D0, D1, D2, D3, D5 }
+#define MATRIX_COL_PINS { F0, F1, E6, C7, C6, B6, D4, B1, F7, B5, B4, D7, D6, B3, B2 }
+#define UNUSED_PINS
+
+/* COL2ROW or ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+/* number of backlight levels */
+#define BACKLIGHT_PIN B7
+#ifdef BACKLIGHT_PIN
+#define BACKLIGHT_LEVELS 5
+#endif
+
+/* Set 0 if debouncing isn't needed */
+#define DEBOUNCE 5
+
+/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
+#define LOCKING_SUPPORT_ENABLE
+
+/* prevent stuck modifiers */
+
+#define RGB_DI_PIN E2
+#ifdef RGB_DI_PIN
+#define RGBLIGHT_ANIMATIONS
+#define RGBLED_NUM 12
+#define RGBLIGHT_HUE_STEP 8
+#define RGBLIGHT_SAT_STEP 8
+#define RGBLIGHT_VAL_STEP 8
+#endif