[CoLab] Add feature to mute discussion channel notifications
To avoid spamming, users subscribed to a discussion channel should be able to disable all notifications as required.
Reference; Figma board Ellipsis menu.
Suggested solution;
- to add an ellipsis menu to the discussion channel, with a single dropdown option; 'Mute channel' - this should suppress all chat email notifications from being sent from Kotahi. This action can be enabled per channel.
- Users should be aware that a channel has been muted.