Moved padchest configs to data

pyproject.toml

src/ptbench/configs/datasets/padchest/__init__.py

src/ptbench/configs/datasets/padchest/idiap.py

src/ptbench/data/padchest/__init__.py

src/ptbench/data/padchest/cardiomegaly_idiap.py

src/ptbench/data/padchest/idiap.py

src/ptbench/data/padchest/no_tb_idiap.py

src/ptbench/data/padchest/tb_idiap.py

src/ptbench/data/padchest/tb_idiap_rgb.py