Fix: OccluderSystem ignored entity rotation when calculating AABB

[ThereDrD0]

Issue

Occluder system translated box2 but did not take into account entity rotation. This logic only works if the box is a square.
But if someone creates non-square box2 - any rotation breaks the logic.

I found this bug while debugging why people could see through my double airlocks.

Media

Before - a rotated double airlock with boundingBox: "-0.5, -0.5, 1.5, 0.5" in Occluder is half "transparent"

2026-02-09.04-08-41.mp4

After - you can't see through it anymore. Great!

2026-02-09.04-10-29.mp4

Double airlock prototype i used when recording videos.

- type: entity  
  id: DoubleAirlock  
  parent: Airlock  
  name: double airlock  
  components:  
  - type: Sprite  
    sprite: double_basic.rsi  
    offset: 0.5,0  
    snapCardinals: false  
  - type: Fixtures  
    fixtures:  
      fix1:  
        shape:  
          !type:PhysShapeAabb  
          bounds: "-0.49,-0.49,1.49,0.49"  
        density: 100  
        mask:  
        - FullTileMask  
        layer:  
        - AirlockLayer  
  - type: Occluder  
    boundingBox: "-0.5, -0.5, 1.5, 0.5"

[PJB3005]

Multi-tile occluders cannot work with the current occlusion system. This PR doesn't work.