[Feature Request] document/handle sync keys for self-hosted Anki instances

[fx-chun]

Module Name

programs.anki

Requested Feature

As mentioned in #7562 , the Anki sync key is distinct from the account password used to obtain the key. This is pretty easy to obtain from AnkiWeb, but it is undocumented for self-hosted Anki instances using the services.anki-sync-server NixOS option.

Some different approaches we could take:

• document the current implementation of Anki sync key generation in the module. It is pretty trivial ( hex(sha1("username:password")) ), maybe we could provide a shell script or something: https://github.com/ankitects/anki/blob/dac26ce67147b261d79a56092320cc2f5af0d990/rslib/src/sync/http_server/mod.rs#L149-L152
• just re-implement the login flow Anki already does in hm-sync-config and provide an account password option: https://github.com/ankitects/anki/blob/dac26ce67147b261d79a56092320cc2f5af0d990/qt/aqt/sync.py#L315-L329

What do people think?

Current Limitations

No response

Additional Context

No response

[fx-chun]

cc @JuneStepp @khaneliman since you've been doing some work here recently :)