Docusaurus based documentation

We now use Docusaurus for our documentation website. This website contains basic documentation about UnHIDE interfaces, based off of what was in the previous version of the documentation.

Closes #6 (closed)

docs/guides/web-ui/secondary-features.md

@@ -4,3 +4,15 @@ sidebar_position: 3
 ---
 
 # Other features
+
+## JSON-LD source
+
+For each metadata record shown in the results list, at the bottom of each card, the user can find a link to all information in the record displayed in its JSON-LD object form. This feature allows users to look for details of the record on a more granular level and might help in case a piece of information they are looking for exists as part of the record but is not explicitly shown in the record card of the web view.
+
+## Hyperlinked metadata
+
+In cases where a particular piece of information in a metadata record has a web address and can be navigated to, this piece of information is made clickable - which takes the user to the web page connected to the information.
+
+## Responsive UI
+
+The web UI application is available for usage on mobile, iPad, laptop and desktop views. This makes the application accessible for users in most widely used devices.