P0-B5: Part 1253: Debugging, Improvements

The floating origin system now basically works with the terrain scanner, and I have also made some improvements and optimisations to it that make it a lot cleaner and, hopefully, more efficient.

The only problem is that I have not tested async/await with the terrain scanner, and ideally, I would like to use this system.

Once this is done, I can completely replace the remaining asynchronous scanning code, which should take a week or so.

I can then proceed with the next part of the project. There is still quite a bit of debugging that I would like to do before I move on to any new features.