feat: Show diff when navigating revision history (#4069)

* tidy

* Add title to HTML export

* fix: Add compatability for documents without collab state

* Add HTML download option to UI

* docs

* fix nodes that required document to render

* Refactor to allow for styling of HTML export

* div>article for easier programatic content extraction

* Allow DocumentHelper to be used with Revisions

* Add revisions.diff endpoint, first version

* Allow arbitrary revisions to be compared

* test

* HTML driven revision viewer

* fix: Dark mode styles for document diffs

* Add revision restore button to header

* test

* Support RTL languages in revision history viewer

* fix: RTL support
Remove unneccessary API requests

* Prefetch revision data

* Animate history sidebar

* fix: Cannot toggle history from timestamp
fix: Animation on each revision click

* Clarify currently editing history item

server/presenters/revision.ts

@@ -1,13 +1,14 @@
 import { Revision } from "@server/models";
 import presentUser from "./user";
 
-export default async function present(revision: Revision) {
+export default async function present(revision: Revision, diff?: string) {
   await revision.migrateVersion();
   return {
     id: revision.id,
     documentId: revision.documentId,
     title: revision.title,
     text: revision.text,
+    html: diff,
     createdAt: revision.createdAt,
     createdBy: presentUser(revision.user),
   };