LibWeb: Add missing MEDIAQUERIES-5 media-features

This adds (or at least stubs-out) the following:
- display-mode
- dynamic-range
- environment-blending
- forced-colors
- horizontal-viewport-segments
- vertical-viewport-segments
- inverted-colors
- nav-controls
- prefers-contrast
- prefers-reduced-data
- prefers-reduced-motion
- prefers-reduced-transparency
- scripting
- video-color-gamut
- video-dynamic-range

The `@media (inverted-colors)` CSS that the spec requires we add to the
UA style sheet does not actually do anything for us yet since we don't
support `filter`, but it seemed sensible to include it now to avoid
forgetting later. :^)

Userland/Libraries/LibWeb/CSS/Default.css

@@ -306,3 +306,13 @@ mark {
  * https://html.spec.whatwg.org/multipage/rendering.html#embedded-content-rendering-rules
  */
 iframe { border: 2px inset; }
+
+/* https://www.w3.org/TR/mediaqueries-5/#descdef-media-inverted-colors
+ */
+@media (inverted-colors) {
+    img:not(picture>img),
+    picture,
+    video {
+        filter: invert(100%);
+    }
+}