P0-B7: Part 1370: Debugging, Improvements

I am still focusing on the debugging for the main story sequence in the game.

I have added several quality of life improvements to the object spawning code, such as making sure that the height offset is always correct (so that the object isn’t beneath the terrain, or floating above it), etc.

I have also improved the paging system, to make sure that all colliders are disabled when the player moves away from the object.

I have also fixed a longstanding bug with the placement of AI in the world that resulted in their place position being wrong.