prompt utility script doesn't fetch shader files on custom code lists

The filters for option 4 does not allow *.frag *.vert files to be included in output. The script output when trying to copy files is
```
Warning: */Studio-Whip/rust/shaders/text.frag not found or not a .rs or .toml file
Warning: */Studio-Whip/rust/shaders/text.vert not found or not a .rs or .toml file
```
Need to change the filter to allow these files