Entity Repo & Controller Refactor (#1690)

* 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

tests/Uploads/ImageTest.php

@@ -367,7 +367,7 @@ class ImageTest extends TestCase
         $image = Image::where('type', '=', 'gallery')->first();
 
         $pageRepo = app(PageRepo::class);
-        $pageRepo->updatePage($page, $page->book_id, [
+        $pageRepo->update($page, [
             'name' => $page->name,
             'html' => $page->html . "<img src=\"{$image->url}\">",
             'summary' => ''
@@ -379,7 +379,7 @@ class ImageTest extends TestCase
         $this->assertCount(0, $toDelete);
 
         // Save a revision of our page without the image;
-        $pageRepo->updatePage($page, $page->book_id, [
+        $pageRepo->update($page, [
             'name' => $page->name,
             'html' => "<p>Hello</p>",
             'summary' => ''