Add a Python script for TKey-based full disk encryption key generation
and disk encryption operations:
- Generate hardware-backed encryption keys using TKey's Ed25519
signature and SHA-256 hashing
- Encrypt disk images with LUKS using the derived keys
- Open LUKS encrypted disks using the derived keys
- Support for both interactive password input and file/stdin input
- Automatic TKey device detection via USB enumeration
The script derives deterministic encryption keys from a password and
the TKey's unique device identifier, suitable for unlocking encrypted
root filesystems at boot time.
Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
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