feat: Add HTML export option (#4056)

* 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

shared/editor/components/Styles.ts

@@ -0,0 +1,8 @@
+import styled from "styled-components";
+import style, { Props } from "../../styles/editor";
+
+const EditorContainer = styled.div<Props>`
+  ${style};
+`;
+
+export default EditorContainer;