Evaluate systemd-homed for user home storage encryption and management

[travier-anssi]

Evaluate the functionality available in systemd-homed for usage as user home storage management.

Important features

• [ ] Guarantee user data integrity and confidentiality
• [ ] Support fixed size LUKS2/DM-Crypt/DM-Integrity based user partitions
• [ ] Encryption based on user-only known secret
• [ ] User credentials managed independently from system roles credentials
• [ ] User credentials supported:
  • [ ] Password
  • [ ] Smartcard
  • [ ] Yubikey-like hardware tokens