We need a full independent backend preferably based on work done in distinst or something, a rewrite of it perhaps
### Tasks
- [ ] Refactor structure to be backend-independent?
- [ ] Deprecate Albius?
- [ ] Partitioning shenanigans
- [ ] Finally make use of `backhand` and unsquash at lightning speeds!
- [ ] Possible EROFS support?
- [ ] Possibly a DBus system service backend like that of Anaconda or distinst v2?
We need a full independent backend preferably based on work done in distinst or something, a rewrite of it perhaps