refactor: Remove -continue, add use_continue_file internally

feat(advdif): Add bl_height_factor option

fix(tests): Update tests for fixed ts_type alpha

The startup logic for `ts_type: alpha` was fixed in petsc/petsc!7816, so
the reference solutions needed to be fixed as well.

Merge MR !51, 'jrwrigh/fix_advdiff_tau', into 'main'

fix(advdif): Correct gij size, square Ctau_{a,d}

See merge request phypid/honee!51

feat: Add flatplate STG yaml and setup files

Needed for reframe testing on Aurora, offers "real" test of turbulent
flat plate simulations

feat(advdif): Add BL yaml file, use in test

fix(advdif): Correct gij size, square Ctau_{a,d}

- Correct gij size based on reference element size
- Ctau_{a,d} should be squared to align with 1D minreg definitions

feat(advdif): Add Boundary Layer IC, wind type

test(advdif): Add tests for div(F_diff) projection

feat(advdif): Add diffusion tau coefficient

tests(advdif): Add square IC test

test(advdif): Add test for sine wave IC

feat: Implement divergence of diffusive flux

chore: Move navierstokes.* out of root directory

navierstokes.h to include and navierstokes.c into examples

chore: Move yamls, etc to examples directory

ci: Enable smartsim and PyTorch testing

chore: Move smartsim_regression_framework into tests

- Also some refactoring of the Makefile

Co-authored-by: Jeremy L Thompson <jeremy@jeremylt.org>

chore: Move createPyTorchModel

chore: Remove erroneous .pyc file

make - capture j correctly

chore: Get tests back up and running