[xwiki-notifications] [jira@xwiki.org][Issue] Updates for CRISTAL-348: Add support for attachment preview in the file system backend

Attachments:

• attachment.html (text/html — 21.6 KB)
• attachment.png (image/png — 267 bytes)
• attachment.png (image/png — 625 bytes)
• attachment.png (image/png — 2.5 KB)