[XB] Attachment Constraints Permissions 1.2.0 Patch 1

Control upload limits for attachments, avatars, and profile banners based on user permissions.

• Attachment Constraints
  • Limit max count, size, width, and height per message.
  • Node-specific permissions for posts via forum permissions.
• Avatar Constraints
  • Set limits for maximum size, width, and height.
• Profile Banner Constraints
  • Define max size, width, and height for profile banners.
• Helpful Hints
  • Display a hint near the upload button showing the maximum allowed attachment size.