Fix sorting of filenames with alphanumeric prefixes.

[branyang02]

Enhance filename sorting by extracting numeric parts

• Added a new function _extract_numeric to extract numeric values from filenames containing alphanumeric characters.
• Updated the sorting key function to utilize _extract_numeric, improving handling of filenames with both numeric prefixes and postfixes (e.g., 'DSCF5858', 'IMG1234').
• Ensured compatibility with filenames where numeric values are embedded within strings.

[ShuoShenDe]

The extract number function works when the name is with number, but fails when there are multiple numeric parts in the name

[sam31046]

My solution here is to allow passing a list into it:
#214