style: Use "D" for GradUnpack

The values correspond to the physical dimension, not any arbitrary "N"
value

style: Corrections from make checkbadSource

refactor: Extract NewtonianIGProperties from NewtonianIdealGasContext

refactor: Remove c_tau from Newtonian options

It isn't implemented anyways.

TODO: Need to edit documentation to reflect the change (if Newtonian has
any lingering references to c_tau)

fix(newt): Initialization of sigma variable

Not necessary, but quiets the linters

doc: Better document Linear Ramp Coefficient

refactor: Use SetValueN instead of manual for loop zeroing

feat(newt): Extract Newtonian and IDL jacobian functions

refactor(newt): Refactor the extracted IFunction, add docstrings

feat(newt): Extract Newtonian and IDL Integrand functions

feat(qf_utils): Add AXPY

feat(newt): Add const qualifiers to helper functions

(!136) Amin/mean only fix

feat: Add spanstats for CFL and Peclet number

- Add CalculatePe* to numerics.h

refactor: Extract CFL calculation from monitor

feat(spanstats): Combine turbulence.h and turb_stats_types.h

style: Move spanstats into subdirectory

feat: Move matrix inverse out of setupgeo -> utils

fix: Move enum strings to compilation units

feat: Move PetscOptionEnum char arrays to enum defs in QF files

feat(bc): Shrink jac_data_size to that being used

refactor(bc): Extract Outflow from freestream files

Outflow should be treated separately from freestream

style: Move comment in blasius ChebyshevEval

tg: Add background_velocity option for TaylorGreen IC

doc: Rearrange documentation