Add support to run any Chromium-based or Gecko-based browsers

[cezaraugusto]

Fix #59

Support is via --chromium-binary and --gecko-binary flags.

You can run Brave, for example:

Test Plan

# Assuming you're on macOS
pnpm extension dev ./examples/new-env --chromium-binary="/Applications/Brave Browser.app/Contents/MacOS/Brave Browser"

[pkg-pr-new]

Open in Stackblitz

pnpm add https://pkg.pr.new/extension-js/extension.js/extension-create@186

pnpm add https://pkg.pr.new/extension-js/extension.js/extension@186

pnpm add https://pkg.pr.new/extension-js/extension.js/extension-develop@186

commit: 8304aae

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

[OSpoon]

The two new flags are great, they run well~