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/e7v1/e7v1.c

@@ -0,0 +1,25 @@
+#include "e7v1.h"
+
+void matrix_init_kb(void) {
+  setPinOutput(F0);
+  matrix_init_user();
+}
+
+void matrix_scan_kb(void) {
+  matrix_scan_user();
+}
+
+bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
+  return process_record_user(keycode, record);
+}
+
+void led_set_kb(uint8_t usb_led) {
+  if (usb_led & (1 << USB_LED_CAPS_LOCK)) {
+    writePinHigh(F0);
+  } else {
+    writePinLow(F0);
+  }
+
+  led_set_user(usb_led);
+}
+