WIP: bring back macOS support with added BD support

[wojas]

Work in progress macOS support with added BD support, as mentioned in https://github.com/speed47/dvdisaster/issues/57#issuecomment-1059996683.

Remaining issues:

• [ ] BD support
• [ ] macOS CLI support
• [ ] The UI does not update correctly, making it unusable
• [ ] Remove 'return' workaround to make it compile
• [ ] No CI integration yet

[speed47]

I'm closing this PR as your work has been continued in #68, thanks!