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* thcrap_update: handle games started through wrapper patches

This fixes issue #69

* thcrap_update: update throgh wrapper patches: handle multiple loaders

* thcrap_update: fix race condition

* thcrap_update: fix deadlock and properly handle background_updates=false

update_at_exit seems to still be broken

* wrapper update: exchange data in a nicer format

* wrapper update: fix background_updates

* wrapper update: fix race condition

* wrapper update: fix todo

* wrapper update: experimental update at exit fix

* wrapper update: better update_at_exit mechanism

* wrapper update: communicate back game_id with update_at_exit

* wrapper update: fix update_at_exit behaviour with wrapper patches to mimic last version

* wrapper update: consider some of zero318's suggestions

* thcrap: move PID removal code to ExitDll

* thcrap: loader_pid should be a 32-bit integer specifically

If you have a setting like "disable background updates" enabled, then
the loader UI will disappear pretty quickly after it opens, giving the
user little chance to change that setting back. "thcrap.exe" seems like
a pretty good place to put global settings as well

I am not really sure why 3 different ways were added to convert UTF-8
strings to UTF-16 strings. But out of the ones that were added, masking
was always the fastest in all of my experiments. I therefore decided:
(on a separate branch cause I didn't want to upset anyone)

1) masking should be the one and only utf8_to_utf16 function
2) a similar function should also be used for UTF-32
3) these functions should be used everywhere, and mbrtoc16 and mbrtoc32
   should be avoided, since these functions are unimplemented in Wine

And the 3rd point is the whole reason I did any of this to begin with.

This would fix the issue where Wine users are unable to have patches
that use UTF-16 strings in any of their options fields and would finally
allow me to fix hint files in th10

fixes #199

fixes #205

This fixes #210

I mainly did this for
https://github.com/major-gnuisance/thcrap-linux-ez, which handles
searching for games on it's own and tells the user to click Cancel in
our tool once it reaches searching for games, though this is just a
tool that wants thcrap_configure to create a patch stack, download the
core patch files and resolve dependencies, while doing everything else
on it's own.

I definitely want to do some testing on my own whenever I get my own
Steam Deck

This is to unbreak cave_exec: true

THis is very hacked together at the moment, I just wanted it to work
somehow