WIP: ENH: renovate v2-f turbulence closure model

• Implementation-related:

  • corrects strain rate and tke production term to enable consistent compressible formulation

  • corrects Ts and Ls function expressions according to the original paper

  • corrects the transport equation terms to enable consistent compressible formulation

  • adds protections against floating-point exceptions

  • Usage-related:

    • updates the header documentation
    • allows the hard-coded constants to be tuned by users
    • adds tags to easily track the implementations' expressions in the original papers