build: Use prettier for javascript

Stop ignoring .js and .json files in prettier and fix existing issues.

The `prettier-plugin-multiline-arrays` plugin is used to split arrays
with multiple elements into one line per element.

ngcc.config.js

@@ -4,6 +4,6 @@ module.exports = {
       ignorableDeepImportMatchers: [
         /@ckeditor\//
       ]
-    },
+    }
   }
 };