Added design notes

Author: makaroni4

design_notes/0001_using_regular_links.md

@@ -0,0 +1,9 @@
+# Using regular links
+
+:calendar: **Last edited on Feb 5, 2023**
+
+You may have noticed that Visualizer uses regular `<a>` tags for navigation instead of React's `<Link>` components.
+
+The reason is the following exception that's thrown when you follow a link to render another dataset:
+
+![Error with React Router links](./files/error_with_router_links.png)

design_notes/files/error_with_router_links.png

@@ -26,6 +26,7 @@ export function DatabaseMenuPopup(props: DatabaseMenuPopupProps) {
               <div key={databaseName}>
                 <h3
                   className="info-popup__database-name">
+                  { /* design_notes/0001_using_regular_links.md */}
                   <a href={`/databases/${databaseName}`}>{databases[databaseName].name}</a>
                 </h3>