feat: Improve look of Global Search Picker

[nik-rev]

This PR:

• Styles directory segments with ui.text.directory for consistency with the rest of the editor (as well as readability: it is easier now to tell the filename of each entry apart from its path)
• Applies constant.numeric to the line number and : to the colon. This also has the advantage that it's easier to tell apart a filename ending with a colon / number from the actual line number

[iliekturtles]

Consider Path::parent and Path::file_name to get the directory and filename portions of the path. That should help avoid having to iterate over all the components and re-build the directory portion of the path.

[nik-rev]

Consider Path::parent and Path::file_name to get the directory and filename portions of the path. That should help avoid having to iterate over all the components and re-build the directory portion of the path.

Thanks for the suggestion!

[DoctorRyner]

Shouldn't this be done for file picker as well? Because I think it would make sense

[nik-rev]

Shouldn't this be done for file picker as well? Because I think it would make sense

Some themes use the same color to highlight search matches and the directory. It'd be confusing to have 2 colors mean the same thing.

It's a good idea, but I'd say it needs some prior discussion first and probably different PR to keep this one small