Rotate annotations based on the MK::R value (bug 1675139)

- it aims to fix: https://bugzilla.mozilla.org/show_bug.cgi?id=1675139;
- An annotation can be rotated (counterclockwise);
- the rotation can be set in using JS.

web/annotation_layer_builder.css

@@ -51,6 +51,7 @@
   text-align: initial;
   pointer-events: auto;
   box-sizing: border-box;
+  transform-origin: 0 0;
 }
 
 .annotationLayer .linkAnnotation > a,