Run pytest with dockerized Basilisk

[Mark2000]

Pytest suite should be run automatically as a GitHub action. Requires containerized Basilisk environment to run; @patkenneally has done this for LASP, may be a good starting point.

Challenges:

• How to handle Basilisk/bsk_rl version compatibility? Develop of rl may be dependent on latest develop of basilisk
• Where to run?

For example scripts, would be really nice to give output in documentation for time to run at each release (I think a fairly standard feature) as a way of keeping an eye on any big performance issues.