Add Wide Color Gamut in 2D Canvas

[Schweinepriester]

• Spec (Thanks!):
  • https://html.spec.whatwg.org/multipage/canvas.html#concept-canvas-color-space
  • https://html.spec.whatwg.org/multipage/canvas.html#predefinedcolorspace
• Safari: Shipped in 15.1 https://webkit.org/blog/12058/wide-gamut-2d-graphics-using-html-canvas/
• Chrome: Shipped in 94 https://chromestatus.com/feature/5807007661555712
• Firefox: ?
• Simple test could be stolen from https://webkit.org/blog/12058/wide-gamut-2d-graphics-using-html-canvas/#:~:text=Feature%20detection,support%20is%20available., the function canvasSupportsDisplayP3