TODOs / Missing features in 0.9X vs iroh-docs 0.35:

[ramfox]

• Doc::export_file and Doc::import_file are missing. Would need some more work to port them, I didn't get around to that yet. But it's not super critical, as you can import via iroh-blobs and then use Doc::set_hash.
• Document all the API changes (this is quite a bit of work - best way likely to compare the docs for old and new version)
• Maybe: Convert errors to snafu. This is still using anyhow and thiserror. It is quite some work, not sure about it yet.