Tasks - Himalaya — ContextQMD

Land the extended-LIST RETURN option upstream in imap-codec (duesee/imap-codec#350)
Expose LIST RETURN (SPECIAL-USE) on io-imap's LIST coroutine
List mailboxes over the reused IMAP test connection in the wizard
Map the RFC 6154 special-use attributes to alias keys, on top of INBOX
Keep the fallback to INBOX only when the listing is empty or fails
Update config.sample.toml and CHANGELOG