feat: Create Soreide-Whitson fluid model

[dkachuma]

Adds the Soreide-Whitson fluid model

• Creates a FlashData object to hold parameters required for the flash. The point of this is that as we have different EoS and different flashes, they may need different parameters (e.g. salinity) and this object encapsulates all the parameters.
• Adds the Soreide-Whitson equation of state to the enumeration. Adds it to FugacityCalculator and CompositionalDensityUpdate.
• Fixes a typo in the CO2-H2O SW binary interaction coefficient.
• Creates a two phase fluid model (CompositionalTwoPhasePhillipsBrine) with a Phillips brine as a liquid phase and a compositional fluid as a gas phase.