* Started mass-refactoring of the current entity repos
* Rewrote book tree logic
- Now does two simple queries instead of one really complex one.
- Extracted logic into its own class.
- Remove model-level akward union field listing.
- Logic now more readable than being large separate query and
compilation functions.
* Extracted and split book sort logic
* Finished up Book controller/repo organisation
* Refactored bookshelves controllers and repo parts
* Fixed issues found via phpunit
* Refactored Chapter controller
* Updated Chapter export controller
* Started Page controller/repo refactor
* Refactored another chunk of PageController
* Completed initial pagecontroller refactor pass
* Fixed tests and continued reduction of old repos
* Removed old page remove and further reduced entity repo
* Removed old entity repo, split out page controller
* Ran phpcbf and split out some page content methods
* Tidied up some EntityProvider elements
* Fixed issued caused by viewservice change
- Updated breadcrumb dropdown switchers and back-end sibling code to handle new breadcrumbs.
- Added breadcrumb view composer and EntityContext system to mangage
tracking if in the context of a bookshelf.
Added per-entity weighting changes.
Now Books score higher than chapters which score higher than pages.
Reduced queries required on search by only searching once but at a
higher count to see if there's another page.
Added search result pages for pages, chapters and books.
Limited the results on the global search as it just listed out an infinate amount.
Fixed styling on new detailed page listings and also removed the 'bars' from the side to create a cleaner view.
Fixed bad sql fulltext query format that may have thrown off searches.
Reduced the number of database queries down a thousand or so.
