LibWeb: Implement CRC2D.imageSmoothingEnabled

We now select between nearest neighbor and bilinear filtering when
scaling images in CRC2D.drawImage().

This patch also adds CRC2D.imageSmoothingQuality but it's ignored for
now as we don't have a bunch of different quality levels to map it to.

Work towards #17993 (Ruffle Flash Player)

Userland/Libraries/LibWeb/HTML/Canvas/CanvasImageSmoothing.idl

@@ -0,0 +1,6 @@
+// https://html.spec.whatwg.org/multipage/canvas.html#canvasimagesmoothing
+interface mixin CanvasImageSmoothing {
+    // image smoothing
+    attribute boolean imageSmoothingEnabled; // (default true)
+    attribute ImageSmoothingQuality imageSmoothingQuality; // (default low)
+};