Allow a command `twofactorauth:state --all`

[solracsf]

This would be useful to export users (ideally in JSON) with their TFA status.
(as a dream, this info should be produced alongside with occ user:list --info ...)

# occ twofactorauth:state --all

"user1": {
    "totp": "true",
    "backup_codes": "true",
},
"user2": {
    "totp": "true",
    "backup_codes": "false",
},
...