- Added new "quest" page type. It's for quests, how did you guess? :o
- Entries with quest pages that are complete will now show up at the end of the list with a checkmark.
- Fixed extension books not being able to define their own advancement namespaces.
- [API] Added some additional context for custom components.
- [API] Added the ability for custom components to add buttons.
- [API] Added the ability to bind arbitrarily loaded template JSONs as built-in page types.
- [API] Increased version number to 6.