chainmail flag
Star messages: add \Flagged. Refs come from the arguments, or one per line on stdin when the only argument is -.
Usage
chainmail flag <ref>...
Examples
chainmail flag cm1:work:INBOX:7:42
Global flags
--output string output format: json or table (default $CHAINMAIL_OUTPUT, then cli.toml, then table on a terminal, json otherwise)
--socket string daemon socket (default $CHAINMAIL_SOCKET, then cli.toml, then /run/chainmail/chainmail.sock)