[Feature request] Add minimal functional support for Code Aster export

[Krande]

Note to self!

Finish the support for writing Code Aster input file by completing the implementation at

adapy/src/ada/fem/io/code_aster/writer.py

Lines 74 to 93 in 666ebf9

	p = get_fem_model_from_assembly(assembly)
	write_to_med(p, analysis_dir)
	write_export_file(analysis_dir, p.name, 2)
	# TODO: Finish .comm setup based on Salome meca setup
	with open(analysis_dir.with_suffix(".comm"), "w") as f:
	f.write('mesh = LIRE_MAILLAGE(FORMAT="MED", UNITE=20)\n\n')
	f.write(
	"""model = AFFE_MODELE(
	AFFE=_F(
	MODELISATION=('3D', ),
	PHENOMENE='MECANIQUE',
	TOUT='OUI'
	),
	MAILLAGE=mesh
	) \n"""
	)
	print(f'Created a Code_Aster input deck at "{analysis_dir}"')

Tip is to download and use Salome Meca to build the necessary input files and see what is needed to add in the .comm file and\or med file.

When finalized it should be able to run the same cantilever example as demonstrated for abaqus and calculix in the README.md file.

[Krande]

Functional Code Aster support was added with #12