[Feature request] VDO Support

[athyfr]

Currently Disko doesn't support VDO.

VDO is a disk compression layer. Usually (outside of VDO) compression is applied inside of the filesystem. With VDO, compression (and deduplication) can be applied as a layer (for example, to compress an entire LVM PV).

NixOS has VDO's tools packaged already, inside the package pkgs.vdo.

The official (Red Hat) documentation can be found here.

VDO is recommended to be applied behind encryption (LUKS { VDO { ... } }), if encryption is present, as then deduplication is feasible. This could be mentioned in documentation for beginners.

[Mic92]

I would accept this as a pull requests with a test.