OK, this is the big one. We still keep using `#include` guards only
where we absolutely need to, but with each header now being valid in
isolation, this can now actually help *minimize* the length of each
translation unit's `#include` list. Turns out that after removing all
the duplicates, we only *actually* need to guard 29 headers across all
5 games.
Part of P0285, funded by [Anonymous] and iruleatgames.
I think this is the first time that function pointers as `inline`
function parameters actually inlined perfectly?
Part of P0263, funded by [Anonymous].
Been a while since I abused string constants for temporary alignment
hacks! Almost forgot about that technique. This time around though, I'm
using `$` to address the extra string in C land, which only *slightly*
breaks position independence.
Part of P0263, funded by [Anonymous].
nmlgc