Add Blocking meshes for IVAs

[ChrisAdderley]

Required for:

• [ ] SCATTER-1 Service Airlock-
• [ ] EVAC-U-8 Airlock Module
• [x] PXL-9 Extra-Planetary Octo-Aperture
• [ ] PXL-1 Hostel Deep Space Habitation Module
• [x] PXL-2 Pressurized Conical Storage Container
• [x] PPD-20 Shanty Habitation Module
• [x] PPD-24 Observation Module

[ChrisAdderley]

Completed PPD-24 Observation Module

[ChrisAdderley]

Completed PPD-20 Shanty Habitation Module, PXL-2 Pressurized Conical Storage Container

[ChrisAdderley]

Completed PXL-9 Extra-Planetary Octo-Aperture