fix: catch proper runnames when have 2 file extensions (e.g. xic.parquet)

[jcharkow]

Description

Aims to fix https://github.com/Roestlab/massdash/issues/152 where run inference fails with multiple extensions

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)

Contents (#179)

Other

• catch proper runnames when have 2 file extensions (e.g. xic.parquet)
• failing test

Uncategorised!

• Merge branch 'dev' into patch/multipleFileExtensions