Add the zoom property feature

Author: ddbeck

features/zoom.yml

@@ -0,0 +1,6 @@
+name: zoom
+description: The `zoom` CSS property scales the size of an element. Unlike the `transform` property, a zoomed element affects page layout.
+spec: https://drafts.csswg.org/css-viewport/#zoom-property
+caniuse: https://caniuse.com/css-zoom
+compat_features:
+  - css.properties.zoom