[feat] Modify subject ID regex to also support MEN-RT data files

[vpchung]

Changelog

• Modify the subject ID regex to accept xxxx-x, in addition to the existing ones (xxxxx-xxx, xxxxx)
• Pre-compile the regex outside of loop
• Update programmatic example

Preview

>>> subject_id_pattern = re.compile(r"(\d{4,5}(?:-\d{1,3})?)")
>>> ped_filename = "BraTS-PED-12345-000.nii.gz"
>>> goat_filename = "BraTS-GoAT-12345.nii.gz"
>>> menrt_filename = "BraTS-MEN-RT-1234-1.nii.gz"
>>>
>>> subject_id_pattern.search(ped_filename).group(1)
'12345-000'
>>> subject_id_pattern.search(goat_filename).group(1)
'12345'
>>> subject_id_pattern.search(menrt_filename).group(1)
'1234-1'
>>> 

[vpchung]

I tested the programmatic example before and after the update, and everything is running as expected. Let me know if if there's anything else I should check!