feat: Plugged-Window mesh added

[Henrik2k17]

Summary of Changes

Adds the ability to plug windows (livery specific).

Screenshots

References

Testing instructions

-Only the FBW house livery should have the first two rows plugged.
-Make sure 3rd party liveries are displayed correct (no plugs).
-Make sure the custom plugging works.

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[tracernz]

It would be better to add this in the blender project for the fuselage I think. Do you have a blend file?

[Benjozork]

We should probably document this on our docs as well

[TJCAviation]

I would reccomend making the Plug COMP the exact same as the Fuse COMP

With the Plug COMP being full red, it can cause some issues with the lighting/shadows as the base comp is slightly different around it...so the plugs tend to be a bit brighter then the fuse with in a shadow.

See my attatched image on the overwing exits for what I mean

[tracernz]

We need to get the blend file and png textures for this so we can integrate into our new model build.

[tracernz]

Can this texture be a 2x2, transparent one by default? I don't think it's worth a bunch of VRAM for the tiny number of liveries that will use it.