As an organizer, I want to be able to curate an invitation list and then send bulk invitation emails, so that more people can learn about and ultimately join my activity.

Background: Right now, organizers receive a list of people who are recommended to invite from Invitation Lists. As next steps, we have learned from users during our pilot experiment with the tool that they would like a way to a) select participants to invite, b) have the option to add other users who are not in the participant list, c) be able to send mass emails to users, and d) have a template invitation message that they can edit. This way, they can easily take action after they have received an invitation list with the goal of increasing participation in their organized activities.

We are choosing mass email over talk page messages because mass talk page messages is a right (MassMessage). However, we could look into integrating this flow into MassMessage in the future, potentially, if there is interest and a need.

Notes:

Perhaps to start within the confines of what is allowed in the code, we can allow all organizers, regardless of their rights, to send 20 invitations via email per day? This means we will also need to inform the user about the limitations so they can make the best decisions on who to invite.