fix: open URL in browser on WSL

[mbtools]

Here's a more elegant solution for opening URLs from WSL in your favorite browser. It is based on sensible-browser which is included in the default distribution for WSL. This avoids issues with the WSL environment, cmd.exe. quoting parameters, etc.

In WSL, set the default browser using the BROWSER variable, for example,

export BROWSER="/mnt/c/Program Files (x86)/Google/Chrome/Application/chrome.exe"
or
export BROWSER="/mnt/c/Program Files (x86)/Microsoft/Edge/Application/msedge.exe"

Note: To permanently set the default browser, add the appropriate entry to your shell's RC file, e.g. .bashrc or .zshrc.

To launch a URL from the WSL command line:

sensible-browser https://google.com

To launch a URL using promise-spawn:

const promiseSpawn = require('@npmcli/promise-spawn')
promiseSpawn.open('https://google.com')

Replaces #118
Closes #62

Test

os: 5.15.153.1-microsoft-standard-WSL2
node: 20.18.0
npm: 10.8.2

[wraithgar]

What happens w/ this PR if the user has not set BROWSER?

[mbtools]

If BROWSER is not set, it now rejects the promise with a message similar to what you get in WSL cli:

I adjusted the tests accordingly