Fix #6289: Add powered/unpowered states to ME IO and Spatial IO ports

[62832]

Might need confirmation on whether or not this is enough.

[Technici4n]

This is not going to work since it I don't see any server -> client syncing. Would it make sense to have a different model for each state to properly test this? (+ for a more logical look)

[62832]

Presumably a new model would have some brighter lights on the base texture as a separate overlay for the sake of emissives, but I'd be lying if I said I knew as of now how to go about this.

Gone with the approach of separate textures for on/off.