revive github actions pipeline

[majdkhalife]

when we were still using gzb, branches used to be automatically testsedon github when we made a PR, but but when we changed the thruster orientations that messed up the pipeline
look at this https://github.com/mcgill-robotics/AUV-2025/blob/noetic/.github/workflows/pull_request.yml
and
this is a good dev tool for actions https://github.com/nektos/act

might need unity debloated first tho

[majdkhalife]

https://github.com/mcgill-robotics/AUV-2025/blob/noetic/Docker/actions/Dockerfile#L12

[majdkhalife]

ensure it aligns with how we are integrating unity with ros