Simple Trains 0.6.2 Mechanism Fix Beta 1

MAIN FIXES
1. Turntable interaction footprint expanded to the full 6.8 block visual platform.
2. Clicking a train while it overlaps a turntable activates the turntable instead of mounting.
3. Docked locomotives are raised to sit clearly on the bridge rails.
4. Turret gunner camera moved beyond the muzzle and down to the barrel axis for a clean sight-only first-person view.
5. Heavy crane upper assembly/hook direction offset 180 degrees consistently so the load follows the visible boom.

This is a Beta build. Static verification cannot prove the absence of every runtime/render interaction in third-party modpacks.
