mail/meli: import package

meli aims for configurability and extensibility with sane defaults.
It seeks to be a mail client for both new and power users of the terminal, but
built today.

A variety of email workflows and software stacks should be usable with meli.
Integrate e-mail storage, sync, tagging system, SMTP client, contact management
and editor of your choice to replace the defaults.

features:
-email threads
-multithreaded
-embed your own editor
-plain text configuration
-multi-tasking with UI tabs
-IMAP, Maildir, notmuch, JMAP, mbox
-optional sqlite3 index search
-fast and minimal account configuration
-contact list (+read-only vCard support)
-forced UTF-8 - other encodings are read-only

(pin)