The main problem here is that there's two data arrays representing an actor - sprite and hittype and the engine only uses indices for reference.
By setting up hittype to contain a sprite reference, the function and iterator interface can be rewritten to use a single pointer instead to represent an actor.
The main objective is to reduce the number of accesses to the global arrays which constitute the biggest refactoring blocker.
* moved the part that alters the input before queuing it to GetInput
* moved moveloop into the main function
* reshuffled a few things for better grouping by task.
Currently the bit fields are still separate and they have to be merged, but for now the added memory does not matter.
Having this structure in the common parts will allow work on consolidating the input code, though.
* Build timer still requires initialisation due to multiple `timerSetCallback()` that still need to work.
# Conflicts:
# source/core/menu/menu.cpp
# source/games/duke/src/game.cpp
