[Feature] PIE support

[nicoverbruggen]

See also discussion topic #302.

I would like to have some GUI support for PIE for extensions that are not provided by shivammathur/homebrew-extensions.

[nicoverbruggen]

PIE is pretty dang great, but I'm not sure that the app needs to provide support for it?

Like composer, you are supposed to use it via the CLI to install extensions easily (pie install).

I would like to hear from people who are using PIE if they think this is something they might use. If you think you'd benefit, please respond below!