Email project owners when project changes verification level

[divine-comedian]

Users status between givbacks eligible and vouched and can be triggered based on admins changing the project's status in the admin panel.

From this new flow we should ensure project owners are emailed when their project becomes givbacks eligible or vouched and similarly when their project falls under the required threshold and becomes "unvouched".

The emails should contain relevant details for the project owner to understand why their project's status changed and what benefits did they gain/lose. We should also provide a way for them to reach our discord and appeal to get more vouches if they believe a mistake was made.