[Keyboard] add treeadstone48 (#5405)

* Keyboard: add treeadstone48

* rename layout defines

* Use of pragma once

* move common include code

* fixed info.json

* change keymap layout from kc to normal

* fix alpha revision keymap

* fixed info.json

* remove USE_Link_Time_Optimization

keyboards/treadstone48/treadstone48.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#ifdef KEYBOARD_treadstone48_rev1
+    #include "rev1.h"
+#endif
+
+#include "quantum.h"
+
+#ifdef PROTOCOL_LUFA
+#include "lufa.h"
+#include "split_util.h"
+#endif
+#ifdef SSD1306OLED
+  #include "ssd1306.h"
+#endif