Document and document type read API (#13853)

* Basic structure for document and document type read API

* Handle unpublished, non-variant content

* Expose content type key on ContentTypeSort

* Add the remaining properties to document type (minus list view info, still pending)

* Obsolete more ILocalizationService usage

* Add URLs and template data to document view model

* Clean up + add proprety type appearance

* update submodule commit

* front-end commit

* latest front-end commit

* latest commit

* latest front-end commit

* Rename content property to content value in view model layer

* Add contextual JSON serialization as default JSON serializer

* Add FIXME to content type sort + rearrange constructor parameters

* Fix broken remark tag

* Whitelist breakage for ContentTypeSort

* Add variance info to property type output

* Update src/Umbraco.Cms.Api.Management/Controllers/Document/ByKeyDocumentController.cs

Co-authored-by: Bjarke Berg <mail@bergmania.dk>

* Update src/Umbraco.Cms.Api.Management/Controllers/DocumentType/ByKeyDocumentTypeController.cs

Co-authored-by: Bjarke Berg <mail@bergmania.dk>

* Update src/Umbraco.Cms.Api.Management/Factories/ContentUrlFactory.cs

Co-authored-by: Bjarke Berg <mail@bergmania.dk>

* Add a few FIXME comments about async entity retrieval

---------

Co-authored-by: Niels Lyngsø <niels.lyngso@gmail.com>
Co-authored-by: Bjarke Berg <mail@bergmania.dk>

tests/Umbraco.TestData/LoadTestController.cs

@@ -217,7 +217,7 @@ public class LoadTestController : Controller
         };
         containerType.AllowedContentTypes = containerType.AllowedContentTypes.Union(new[]
         {
-            new ContentTypeSort(new Lazy<int>(() => contentType.Id), 0, contentType.Alias)
+            new ContentTypeSort(new Lazy<int>(() => contentType.Id), contentType.Key, 0, contentType.Alias)
         });
         containerType.AllowedTemplates = containerType.AllowedTemplates.Union(new[] { containerTemplate });
         containerType.SetDefaultTemplate(containerTemplate);