tools.mutt,muchsync: fix folder queries, archive, and startup
mutt:
- Fix notmuch folder queries to use Maildir++ dot prefix
- INBOX opens by default via explicit notmuch spoolfile
- Unread shows all unread across all folders
- Archive (A) tags messages, hidden from INBOX on sync
- Show mailbox counts in sidebar at startup
- Set mbox_type=Maildir, auto-confirm append/create/delete
muchsync:
- Move archived messages from INBOX to archive folder before sync