Spiritus Astrum [P0-B13]: p1534: Towards Early Access

The vast majority of the new modelling and texturing is now done. The artwork is simple, but it should, hopefully, be ok for early access.

I am using a combination of repeating textures and static textures for the artwork.

I have also added most of the lighting and prefab decorations to the scene, but there is still quite a bit of work to do here.

I made some changes to the mission triggers too, as well as some story and dialog changes.

The next goal is to add enemies and more code changes for the mission triggers, and test everything.