Support for architecture-beta diagram type

[fraser-langton]

hi, thanks for the package!

thought I would make a issue to track any decisions around getting architecture diagram types in. I saw it was mentioned in #41 but figured I would make one for this specific feature

[linear]

DEV-24

[RoseSecurity]

Thank you for raising this issue! I've been thinking about how to incorporate this into the tooling as they're also supported in GitHub's rendering as well. I'll do some prototyping and update this issue as we make progress on the development.