This commit introduces a new digest tip which
informs the user about the possibility to create
tasks in a project by receiving an email in its
email alias.
If a project with an email alias is set up it will
show it as an example. Otherwise the tip will be a
generic message.
This introduction will further help explain odoo
capabilities to its users.
Task-2973540
closesodoo/odoo#99740
Signed-off-by: Laurent Stukkens (ltu) <ltu@odoo.com>