direct x injection

> Note: this is a __second priority__ feature
> Note: requires design proposal and review before implementation

It would be good to inject the chromium render (or a texture of the final composite) into a full screen dx application so that a broadcaster that intends to play fullscreen games (like fortnite, forza, etc) can still leverage `overlayed`. Likely using some tech like https://github.com/nefarius/Indicium-Supra

Begin with a design proposal for injecting the Chromium render or final composite texture into a fullscreen DirectX application. Review the linked Indicium-Supra project as a possible technical reference, then seek maintainer review before implementation. Done means an approved design and a working path for broadcasters to use overlayed with fullscreen games.

Written by the indexing model from the issue text.