Initial EGL Support for X11

[rupansh]

This PR adds EGL support for X11 targets. It can be further extended to support wayland as well. Please note that I do not know C# formally so feel free to point out any mistakes.

A fork of Ryujinx which works with this is available - https://github.com/rupansh/Ryujinx I have tested this on the following setup(s) -

Arch Linux
Kernel 5.16.1
RTX 3060 Mobile
Nvidia 495.46
Prime Offload

and

Arch Linux
Kernel 5.16.1
UHD 630

[edisionnano]

This pr has fixed all my issues with nvidia laptops.