Process-dcm

Feat

- update test assertions to include additional MD5 checks for consistency
- update README and main function to clarify '--tol' option usage and set default tolerance
- add reset option to main function and enhance DCM file handling
- enable parallel processing and enhance test coverage with new DICOM examples
- huge refactoring and add DICOMDIR support

Refactor

- update process_dcm function to use Path objects and clean up tests

Refactor

- add type hints to test functions in test_const.py

Feat

- enhance DICOM processing by filtering out empty modalities and improving file type checks

Feat

- add OPTOS_FA modality and corresponding test case

Fix

- update version provider from poetry to pep621 in pyproject.toml
- add thread safety to folder deletion process
- sort DICOM files when loading from input directory
- fix typings

Fix

- :bug: Fix bug about existing folder when using re-group option