general cleanup, d_menu_quit / d_a_obj_testcube mostly done, d_msg_scrn_explain debug (#3065)

* typedef for cPhs_Step

* make sdk includes consistent

* d_menu_quit / d_msg_scrn_explain debug

* d_a_obj_testcube mostly done

* d_debug_pad mostly done

* jstudio tool library headers

* some JStudioCameraEditor headers

* d_jcam_editor mostly done

* try fixing some shield regressions

* d_bg_parts mostly done

* fix merge errors

* debug fix

include/JSystem/J3DU/J3DUClipper.h

@@ -1,7 +1,7 @@
 #ifndef J3DUCLIPPER_H
 #define J3DUCLIPPER_H
 
-#include "dolphin/mtx.h"
+#include <dolphin/mtx.h>
 
 /**
  * @ingroup jsystem-j3d

include/JSystem/J3DU/J3DUD.h

@@ -1,7 +1,7 @@
 #ifndef J3DUD_H
 #define J3DUD_H
 
-#include "dolphin/types.h"
+#include <dolphin/types.h>
 
 namespace J3DUD {
     inline f32 JMAAbs(f32 x) {