Regroup all Exclusive keyboard in one directory

To reduce clutter in the `keyboards/` directory, this patch moves all
keyboards definitions for Exclusive boards to its own subdirectory.

keyboards/exclusive/e6_rgb/config.h

@@ -0,0 +1,65 @@
+/**
+ * config.h
+ *
+ */
+#pragma once
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0xDEAD
+#define PRODUCT_ID      0xFEED
+#define DEVICE_VER      0x0062
+#define MANUFACTURER    astro
+#define PRODUCT         e6rgb
+#define DESCRIPTION     60% rgb keyboard
+
+/* key matrix size */
+#define MATRIX_ROWS 5
+#define MATRIX_COLS 14
+/* key matrix pins */
+#define MATRIX_ROW_PINS { F1, F4, F5, F6, D6 }
+#define MATRIX_COL_PINS { D7, B4, B5, B6, C6, C7, F7, F0, B0, B1, D2, D3, B3, B2 }
+#define UNUSED_PINS
+#define DIODE_DIRECTION COL2ROW
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCE 5
+
+/*
+ * Feature disable options
+ *  These options are also useful to firmware size reduction.
+ */
+
+/* disable debug print */
+//#define NO_DEBUG
+
+/* disable print */
+//#define NO_PRINT
+
+/* disable action features */
+//#define NO_ACTION_LAYER
+//#define NO_ACTION_TAPPING
+//#define NO_ACTION_ONESHOT
+//#define NO_ACTION_MACRO
+//#define NO_ACTION_FUNCTION
+
+//rgb light setting
+#define RGBLED_NUM      6
+#define RGB_DI_PIN      B7
+#define RGBLIGHT_ANIMATIONS
+#define RGBLIGHT_HUE_STEP 8
+#define RGBLIGHT_SAT_STEP 8
+#define RGBLIGHT_VAL_STEP 8
+
+#define DRIVER_ADDR_1 0b1010000
+#define DRIVER_ADDR_2 0b1010000 // this is here for compliancy reasons.
+
+#define DRIVER_COUNT 2
+#define DRIVER_1_LED_TOTAL 63
+#define DRIVER_LED_TOTAL DRIVER_1_LED_TOTAL
+
+// tapping setting
+#define TAPPING_TERM    200
+#define RETRO_TAPPING
+#define PERMISSIVE_HOLD