Add Air-Water Equilibrium Property Package

[kurbansitterley]

Fixes/Resolves:

Adds the Air-Water Equilibrium (AWE) property model, tests, and docs to WaterTAP.

Summary/Motivation:

This is a property model developed for REFLO that is meant to describe a liquid-air system that could be used for prommis. Other models that use this property model will follow after this is merged

Changes proposed in this PR:

• Add AWE property model
• Add test for AWE property model
• Add AWE docs

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[kurbansitterley]

rule_pressure_vap_sat is defined multiple times, causing the pylint failure. I am not sure how to get pylint to ignore this.

[kurbansitterley]

@lbianchi-lbl here is the function that is redefined

[kurbansitterley]

@lbianchi-lbl and here is my attempt at coercing pylint

[ksbeattie]

@kurbansitterley, to disable a pylint check, I believe it needs to be on the exact line that is failing the check, so it would need to be on the line (as a comment at the end) where the function is declared. In this case lines: 2249 & 2261.

[kurbansitterley]

@ksbeattie ok putting it on each line and then running black caused it to not be on the same line anymore, so I put it at the top of the file, let's see if that works

[ksbeattie]

Heh, didn't work. I think just putting the one disable at the beginning of the _pressure_vap_sat function (~line 2178) might be the best approach here.