Multiple portal roots

[LoganDark]

As my application grows larger and continues to grow out of the restrictions of headlessui, I have run into another problem that is currently not possible to help without moving to another package. Namely, there can only be one portal root. If I open a dialog in a new window, it will appear in the main window because that is where the portal root is.

Currently there is no way to provide a new portal root. You can only add an element with the ID headlessui-portal-root before ever using any headlessui portal components at all.

I would love a way to provide a new portal root, probably via react contexts.