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/e6v2/oe/oe.c

@@ -0,0 +1,53 @@
+#include "oe.h"
+
+void matrix_init_kb(void) {
+	// put your keyboard start-up code here
+	// runs once when the firmware starts up
+
+	matrix_init_user();
+}
+
+void matrix_scan_kb(void) {
+	// put your looping keyboard code here
+	// runs every cycle (a lot)
+
+	matrix_scan_user();
+}
+
+bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
+	// put your per-action keyboard code here
+	// runs for every action, just before processing by the firmware
+
+	return process_record_user(keycode, record);
+}
+
+void led_set_kb(uint8_t usb_led) {
+	// put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
+	DDRB |= (1<<6);
+	if (usb_led & (1<<USB_LED_CAPS_LOCK)) {
+			// output low
+			DDRB |= (1<<2);
+			PORTB &= ~(1<<2);
+		} else {
+			// Hi-Z
+			DDRB &= ~(1<<2);
+			PORTB &= ~(1<<2);
+		}
+	// DDRB |= (1<<7);
+	// DDRB |= (1<<1);
+	// DDRB |= (1<<3);
+	// DDRE |= (1<<6);
+	if (usb_led == 0){
+		PORTB |= (1<<6);
+		// PORTB |= (1<<7);
+		// PORTB |= (1<<1);
+		// PORTB |= (1<<3);
+		// PORTE |= (1<<6);
+	}
+	else{
+		PORTB &= ~(1<<6);
+		// PORTB &= ~(1<<7);
+	}
+    
+	led_set_user(usb_led);
+}