v1.5.0

Tested on bookstack v24.05.1

This release adds:

• image exporting (--images)
  • all images from gallery are exported to dedicated directory in export path root, preserving their internal paths
• markdown image tags updating (--markdown-images) (experimental)
  • same as --images but additionally will update markdown files to point to those local files. API does not provide a way to tell which images are currently on given page, therefore this is achieved in a tricky way, and can have some side effects, but generally it seem to work.