[xwiki-notifications] [[email protected]][Issue] (LLMAI-57) Add support for uploading attachments using the REST API

Attachments:

• attachment.png (image/png — 3.3 KB)
• attachment.html (text/html — 15.6 KB)
• attachment.png (image/png — 625 bytes)
• attachment.png (image/png — 1.1 KB)
• attachment.png (image/png — 294 bytes)