Add DirectX11 software grabber support for multi monitors on Windows

Allows to capture two or more display outputs on Windows 10/11 using DirectX11 grabber.
Different resolutions or mixed SDR/HDR capable displays are supported as on the screenshot.

<img src="https://github.com/user-attachments/assets/c9cd3335-ccb1-406d-bce1-d63d163309d7" width="700px" />