Feature Request: Alternative double-storey lowercase g for upright and italic fonts

Description of the new feature/enhancement (with images if possible)

The existing single-storey lowercase g works just fine for both upright and italic fonts. However, since some typefaces offers both single-storey lowercase g and double-storey lowercase g (E.g. IBM Plex, Jetbrains Mono, Sudo etc.) I think it would be quite nice if Cascadia Code/Mono also offers such feature.

Thank you very much in advance for your consideration.

Proposed technical implementation details (optional)