chore: ignore annotation files from prettier

.prettierignore

@@ -8,6 +8,7 @@
 packages/core/scripts/api.handlebars
 packages/core/scripts/events.handlebars
 packages/core/test/files/annotations.js
+packages/**/annotations.js
 **/uikit-workshop/src/js/**/*
 *.json
 *.md

packages/edition-twig/source/_annotations/annotations.js

@@ -1 +1,9 @@
-module.exports = {};
+{
+  "comments" : [
+    {
+      "el": "header[role=banner]",
+      "title" : "Masthead",
+      "comment": "The main header of the site doesn't take up too much screen real estate in order to keep the focus on the core content. It's using a linear CSS gradient instead of a background image to give greater design flexibility and reduce HTTP requests."
+    }
+  ]
+}