Review of #5280.
- Removed additional non-needed loads which could ignore permissions.
- Updated new formatter method name to be more specific on use.
- Added test case to cover changes.
- Updated API examples to align parent id/info in info to be
representative.
Review of #4313
- Made constructor changes while reviewing some classes.
- Updated API examples for consistency.
- Tweaked formatting for some array changes.
- Simplified added tests.
- Tweaked chapter/page repo priority handling to be simpler.
Performed manual API endpoint testing of page/chapter create/update.
Created a generic list formatting helper class for this, to align with
logic used on the search results endpoint and for easier future re-use
in a standardised way.
Also updated some class property types.
Added test to cover new books-contents results.
Related to #3734
