Add-ons Attachment Improvements By Xon 2.6.1

• php 8.4+ compatibility
• XF2.3 compatbility
• Fix XFRM support when XFRM is installed after Attachment Improvements

• Require StandardLib v1.18.0+
• Fix typo 'Strip JPEG EXIF' option text
• Fix "Allow inline display of SVG image attachments" option was not actually wired up as expected
• Improve resizing of SVGs to avoid unexpected truncation
• Improve handling of SVGs which might have been rejected due to formatting
• Add "Only admins can upload SVGs as images" option
• Add SVG support for XFRM icons

• Only support range-requests for local files, not remote filesystems as the underlying library does not support determining if this is suppotred.
• Ensure attachments SVGs are only served as images if it is known to be valid, and inline display of SVGs is permitted.
• Remove non-implemented "Allowed Image Attachment File Extensions" option
• Add "Allow inline display of SVG image attachments" option, defaults to off (breaking change)