Auto-mount disc images (CD/DVD) on program launch

[EmoonX]

Description

This is just a draft (for now).

If successful, should close #959 and close #2960.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

[REDACTED]

[orowith2os]

The use of flatpak-spawn makes me want to reject this. There should be something else we can do to support disc images... @TheEvilSkeleton?

[orowith2os]

Maybe, does Wine allow mounting in specific directories as devices within its filesystem....? Then we could do this without flatpak-spawn.

[EmoonX]

You don't have to "reject" anything as this is still just a barebones draft. flatpak-spawn is more like a placeholder, I was also using it in another PR until figuring out a library-driven solution is way better (no need to blundle/invoke external commands). So maybe this one here would be the way to go.

Regardless, I didn't actually have luck with fuseiso at all. Games overall don't recognize CDs mounted with it... as opposed to what happens when using gnome-disk-image-mounter or cdemu.

[orowith2os]

FUSE doesn't work under Flatpak, I don't think. Like I said, the best option is probably figuring out how to mount directories as drives in Wine, and asking the user to extract their disc images.