[Keyboard] Add S7 Elephant Rev2 Support (#9398)

* Add S7 Elephant Rev2 Support

* Apply suggestions from code review

I tested the changes on my board as well, thanks for the suggestions!

* Added a default folder in the makefile so that this would no longer be a breaking change

keyboards/s7_elephant/rev1/config.h

@@ -0,0 +1,48 @@
+#pragma once
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0xA13B // Hexidecimal A13B will be Jacky's vendor ID
+#define PRODUCT_ID      0x0007
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    jacky
+#define PRODUCT         S7 Elephant
+#define DESCRIPTION     A high-end 70% custom keyboard
+
+/* key matrix size */
+#define MATRIX_ROWS 5
+#define MATRIX_COLS 16
+
+/* key matrix pins */
+#define MATRIX_ROW_PINS { B0, B1, B2, B3, B4 }
+#define MATRIX_COL_PINS { B6, D0, D1, D2, D3, D4, D5, D6, D7, C6, C7, F4, F5, F6, F7, F1 }
+#define UNUSED_PINS
+
+/* COL2ROW or ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+/* 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
+
+#define RGB_DI_PIN E6
+#ifdef RGB_DI_PIN
+#define RGBLIGHT_ANIMATIONS
+#define RGBLED_NUM 2
+#define RGBLIGHT_HUE_STEP 8
+#define RGBLIGHT_SAT_STEP 8
+#define RGBLIGHT_VAL_STEP 8
+#define RGBLIGHT_SLEEP
+#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
+
+/* Locking resynchronize hack */
+#define LOCKING_RESYNC_ENABLE