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

app/components/Theme.tsx

@@ -2,10 +2,10 @@ import { observer } from "mobx-react";
 import * as React from "react";
 import { ThemeProvider } from "styled-components";
 import { breakpoints } from "@shared/styles";
+import GlobalStyles from "@shared/styles/globals";
 import { dark, light, lightMobile, darkMobile } from "@shared/styles/theme";
 import useMediaQuery from "~/hooks/useMediaQuery";
 import useStores from "~/hooks/useStores";
-import GlobalStyles from "~/styles/globals";
 
 const Theme: React.FC = ({ children }) => {
   const { ui } = useStores();