Support multiple open modals

[jacobsfletch]

An example might be when a mega-menu is open on load, and a cookie banner is also displayed, and both are instances of modals.

[jacobsfletch]

A POC has been released in version v2.0.0-alpha.1. Here's a migration guide: https://github.com/faceless-ui/modal/releases/tag/v2.0.0-alpha.1

To try it out:

yarn add @faceless-ui/[email protected]