Feature Request: Update integrated Dropbear to support ed25519 SSH keys

[PirMei]

Describe the bug
Adding SSH keys of type ed25519 over the web interface as well as via dustbuilder service does not allow SSH access, resulting in a fallback to password authentication.

How to Reproduce
Steps to reproduce the behavior:

1. Add a ssh-ed25519 public key via the web interface or via dustbuilder service
2. Try to connect via ssh with ssh -i $ssh_key_in_ed25519_format root@roborock
3. SSH client falls back to password authentication

Expected behavior
SSH ed25519 keys are accepted by the Dropbear SSH server.

Vacuum Model: Roborock S5

Valetudo Version: RE 0.9.4

User-Agent irrelevant

Additional context
Dropbear got support for ed25519 keys with this Pull Request: mkj/dropbear#91
It's not included in an official release yet afaik, but this might be worth to look into in the future.
See also this comment by tripplet: #151 (comment)_

[rand256]

Dropbear is definitely not a part of Valetudo application, and this is not an image builder repository.
I use vacuumz image builder for creating pre-built images, so that is better place to ask.