Assigning roles

[echoboomer]

Discussed in #73

^{Originally posted by chadcancode December 14, 2022}

1. It would be nice to not have to require assigning certain roles before resolving an incident. For example, we don't use the communications liason role. That's part of being the incident commander.
2. When I open an incident, I automatically page an Incident Commander. I would love to auto-assign them to that role.

[echoboomer]

Incident commander is now the only required role as of the latest patch.