Create a GitHub project template for TPAC meetings and breakouts

[tidoust]

Ideally, creating a new event should be as easy as possible. GitHub has the notion of templates for projects. It would be great to have one so that initialization becomes a matter of clicking a button.

[tidoust]

Consider repo creation and initialization as well.

[ianbjacobs]

We can even start with an existing one: https://docs.github.com/en/issues/planning-and-tracking-with-projects/managing-your-project/managing-project-templates-in-your-organization#copying-a-project-as-a-template