Adding thermal conductivities to NEMO output

[WallyMaier]

Proposed Changes

This PR adds the non-constant thermal conductivities to the NEMO output.

Related Work

Discussion #1888

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[jtneedels]

This looks good to me. I guess I'm curious if this is something we want to push into the base code though. To address LDK29, they would want this for the surface output.

[WallyMaier]

So this will output the surface as well.

Im thinking as more surface effects are looked at, it will become important. Especially when comparing different transport models. I know I used it extensively for in the RANS models.

[jtneedels]

So this will output the surface as well.

Im thinking as more surface effects are looked at, it will become important. Especially when comparing different transport models. I know I used it extensively for in the RANS models.

Good point, I was mis-remembering there to be separate AddSurfaceOutput....

Ok sounds good to me then!