Support other browsers (eg: user-chosen defaults)

## Describe the feature

Currently, when using the `@haul-bundler/cli start [..]`, Chrome is opened to launch the debugger. This is wonderful! However, my default browser is not Chrome, so it's jarring to have Chrome opened for this suddenly.

On this machine, my default browser is Edge. Edge is [now Chromium-based](https://www.theverge.com/2020/1/15/21066767/microsoft-edge-chromium-new-browser-windows-mac-download-os) and [supports native Chrome extensions](https://www.howtogeek.com/411830/how-to-install-google-chrome-extensions-in-microsoft-edge/). It would be great to have a way to respect platform defaults rather than making assumptions.

## Motivation

I try to maintain a separation between personal browsers & work browsers, and having the dev tools automatically make a choice complicates things for me 😁

## Related Issues

I was unable to find previous requests for this.