internet test

### Description of the new feature / enhancement

A function that tests the internet

### Scenario when this would be used?

if you're interested in what the internet is like

### Supporting information

_No response_

The issue names no file, test, or entry point, so there is no stated starting location to read or run. First clarify which PowerToys utility should own the internet test, what it should measure, and what acceptance criteria define done.

Written by the indexing model from the issue text.