Feature request: flutter-web support.

[m-abs]

It would be great to have Iridium to support web. This can be implemented with flutter_inappbrowser 6.x.x, since they now have support for web via iframes.

I'm working on adding web-support here:
https://github.com/Notalib/iridium/tree/feat/browser-support

For this to work, I need to figure out how to open a readium webpublication without starting web service in the application, since that cannot be done in the browser.