Physics Overhaul Update

After Flight Sim Expo 2025 I got some feedback that helped me pin down exactly what was causing an issue that I had with the current flight model. Currently in the game, releasing the stick input does not immediately cease rotations - you keep going for a ways, which made me feel like the flying was a bit sloppy and imprecise.

I discovered that the solution was a couple things;

1. The major one was that control surfaces were lerping from their final position back to their starting position; this meant that even though the stick was not giving input, the control surfaces still were. Removing this lerp fixed a huge part of the issue.

2. I found out the aircraft weren't using the custom calculated inertia tensor! The inertia tensor is basically a set of values that dictate how hard it is to change momentum on a given access. Fixing this makes each aircraft fly more realistically and uniquely.

3. The collision system has been overhauled. Previously I was using a simple convex mesh collider, which basically wrapped around the entire aircraft and gave an imprecise shape. The new system basically voxelizes the aircraft geometry and creates a series of box colliders that match it. This not only improves collision detection but it also improves the inertial tensor calculations!