We should also persist mod options, but those will go in a separate file
because they aren't a part of Settings.
Plugins need some work before that can be saved here. They're not
configurable in the NGW currently, so that needs to be fixed first. It
also appears that it may not be safe to inject the settings object with
plugin options until the game is created, but that needs more
investigation (see the comment in Settings.save_player_settings).
Another obvious candidate would be the desired player mission duration,
but we need to implement custom serialization for that first.
Need to reset the persisted save paths on load, since the file that was
loaded may have been moved since it was saved and the original location
may no longer be accessible.
Fixes https://github.com/dcs-liberation/dcs_liberation/issues/2756.
This is the first step toward bundling all assets related to a save game
into a single item. That makes it easier to avoid clobbering "temporary"
assets from other games like the state.json, but also makes it easier
for players to file bug reports, since there's only a single asset to
upload.
This is only the first step because so far it only includes the various
save files: start of turn, end of last turn before results processing,
and "latest" (the game saved explicitly by the player).
