* Handle existing special case for M5STACK_UNITC6L for DIRECT_MSG_ONLY buzz mode
There already exists a special case for M5STACK_UNITC6L.
Modified it to adhere to new DIRECT_MSG_ONLY buzzer mode
* Add new buzzer mode DIRECT_MSG_ONLY to BuzzerModeMenu
* Disable notifications when buzzer mode is DIRECT_MSG_ONLY
* Change alert_message_buzzer in notification module in DIRECT_MSG_ONLY buzz mode
Better comments
* Fixed spelling in debug log
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
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Co-authored-by: nexpspace <4kosjdicx@mozmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
