Support for Jottacloud as a Backend.

[jinie]

Please agree to the following

• [X] I have searched existing issues for duplicates
• [X] I agree to follow this project's Code of Conduct

Summary

Please add support for using Jottacloud as a storage backend.

Motivation

Jottacloud is a Norwegian cloud provider with around million users.

A rclone backend already exists, which can be used for basing the backend on.

Considered Alternatives

No response

Anything else?

No response

[overheadhunter]

Is this a feature you want to see in Android xor iOS? Asking, because this is the desktop repo

[jinie]

For me personally, I'd be happy with iOS, but I assume there are probably a few android users that would be happy with android support.