Identify method to enable self-service/automated user join to modernapps ninja org

[afewellvmware]

There is currently an issue ticket template to request modernapps ninja org join request, however still a manual process to review ticket and add user.

Would be ideal to establish automated process that notified admins of request in email, where admin can click option within email to approve users.

Need to expand request options to include requests for general participants and associate with appropriate github team, also for Triage users, and additional permission tiers based on new github permissions model.

Need to formalize and document process.