ImGUI image load helpers

[KingRikkie]

I am struggling to find any example on how to load an image from file with Silk.NET. Using Veldrid this is as simple as:

var img = new ImageSharpTexture("image.png");
var dimg = img.CreateDeviceTexture(_gd, _gd.ResourceFactory);
ImgPtr = _controller.GetOrCreateImGuiBinding(_gd.ResourceFactory, dimg); // this returns the ptr to pass to ImGUI.Image()
[. . .]
ImGUI.Image(ImgPtr, new Vector2(300, 300));