text_nextframe now takes deltatime instead of recomputing it, the scene command struct got an overhaul and now it's much easier to write and read

include/text.h

@@ -21,7 +21,7 @@ void text_push(text_t* text,
 void text_show_all_current(text_t* text);
 bool text_is_animating(text_t* text);
 // advance, call every frame, returns false when done
-bool text_nextframe(text_t* text);
+bool text_nextframe(text_t* text, float deltatime);
 uint32_t* text_getfb(text_t* text);
 void text_clear(text_t* text);
 }