Merge branch 'develop' into 'main'

include/tadah/mlip/dataset_readers/castep_castep_reader.h

include/tadah/mlip/dataset_readers/castep_geom_reader.h

include/tadah/mlip/dataset_readers/castep_md_reader.h

include/tadah/mlip/dataset_readers/vasp_outcar_reader.h

include/tadah/mlip/dataset_readers/vasp_vasprun_reader.h

src/castep_castep_reader.cpp

src/castep_geom_reader.cpp

src/castep_md_reader.cpp

src/vasp_outcar_reader.cpp

src/vasp_vasprun_reader.cpp

tests/test_dataset_readers.cpp

tests/tests_data/valid_castep_castep/combined.castep

tests/tests_data/valid_castep_castep/geom.castep

tests/tests_data/valid_castep_castep/md_no_stress.castep

tests/tests_data/valid_castep_castep/md_stress.castep

tests/tests_data/valid_castep_geom/60.geom

tests/tests_data/valid_castep_geom/65.geom

tests/tests_data/valid_castep_geom/70.geom

tests/tests_data/valid_castep_geom/75.geom

tests/tests_data/valid_castep_geom/80.geom