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/JStudio/JStudioCameraEditor/sequence.h

@@ -0,0 +1,20 @@
+#ifndef JSTUDIOCAMERAEDITOR_SEQUENCE_H
+#define JSTUDIOCAMERAEDITOR_SEQUENCE_H
+
+#include "JSystem/JStudio/JStudioCameraEditor/csb.h"
+
+namespace JStudioCameraEditor {
+    struct TSequenceContainer : public csb::TSequenceContainer {
+        TSequenceContainer();
+
+        int GetSequenceValueSetDefaultNumber();
+
+        virtual ~TSequenceContainer();
+        virtual csb::TSequence* Do_create();
+        virtual void Do_destroy(csb::TSequence*);
+
+        /* 0x10 */ int field_0x10;
+    };
+}
+
+#endif