Feat - ICU 8234 helper format-bytes-size (#170)

* feat: 🎸 Add format-bytes-size helper

addons/core/addon/helpers/format-bytes-size.js

@@ -0,0 +1,12 @@
+import { helper } from '@ember/component/helper';
+import filesize from 'file-size';
+
+/**
+ * Takes a int expressing file size in bytes and returns a conversion
+ * into a human-readable string.
+ * "e.g. {{format-bytes-size 164730000}} // 164,73 MB"
+ */
+export default helper(function formatBytesSize([sizeInBytes]) {
+  const numberOfBytes = Number(sizeInBytes);
+  return filesize(numberOfBytes).human('si');
+});