Currently only an email action based on template exists in server actions when
having mail app installed. It basically sends an email based on a mail template.
However being able to post a message on record is also useful. Instead of
sending emails it post on a document as a comment or as a note, like what
users can do using the chatter. Notification flow for those cases is the
classic from post: followers, specified partners, Inbox/Email, ...
Task-2613245 (Server actions mail update / cleaning)
Closes#45640
Part-of: odoo/odoo#75906
Thibault Delavallée
b3fc41cc44