feat: Add iOS, macOS, and BSD native support

[brian6932]

trafficstars

I used this on a rootfully jailbroken iOS device. There are some differences with the paths in the documentation for Darwin based kernels that I had to resolve, but this at least makes it work.

[Lasall]

Are you running apt-fast on one of those systems?

[brian6932]

I used this on a rootfully jailbroken iOS device.

Yes.

[brian6932]

The only thing I'll mention's that root users can delete the lockfile when shlock's used, chflags uchg,schg prevents the root user from deleting the lockfile.