[headers] Create gfxalloc.h, map.h, move protos to gfx.h, z64{player,view}.h (#2233)

* [headers] Create gfxalloc.h, map.h, move protos to z64{actor,player,view}.h

* oops

* bss

* comment on player_lib protos & format

* format map.h

* Move SCREEN_{WIDTH,HEIGHT} and SET_FULLSCREEN_VIEWPORT to z64view.h

* bss

* revert move screen_width/height

* bss

include/gfxalloc.h

@@ -0,0 +1,10 @@
+#ifndef GFXALLOC_H
+#define GFXALLOC_H
+
+#include "ultra64.h"
+
+Gfx* Gfx_Open(Gfx* gfx);
+Gfx* Gfx_Close(Gfx* gfx, Gfx* dst);
+void* Gfx_Alloc(Gfx** gfxP, u32 size);
+
+#endif