perf: Reduce initial bundle size / async bundle loading (#1456)

* feat: Move to React.lazy

* perf: Remove duplicate babel/runtime

* fix: Run yarn-deduplicate

* Further attempts to remove rich-markdown-editor from initial chunk

* perf: Lazy loading of authenticated routes

* perf: Move color picker to async loading
fix: Display placeholder when loading rich editor

* fix: Cache bust on auto reload

server/utils/parseDocumentIds.js

@@ -0,0 +1,39 @@
+// @flow
+import { parser } from "rich-markdown-editor";
+
+export default function parseDocumentIds(text: string): string[] {
+  const value = parser.parse(text);
+  let links = [];
+
+  function findLinks(node) {
+    // get text nodes
+    if (node.type.name === "text") {
+      // get marks for text nodes
+      node.marks.forEach((mark) => {
+        // any of the marks links?
+        if (mark.type.name === "link") {
+          const { href } = mark.attrs;
+          // any of the links to other docs?
+          if (href.startsWith("/doc")) {
+            const tokens = href.replace(/\/$/, "").split("/");
+            const lastToken = tokens[tokens.length - 1];
+
+            // don't return the same link more than once
+            if (!links.includes(lastToken)) {
+              links.push(lastToken);
+            }
+          }
+        }
+      });
+    }
+
+    if (!node.content.size) {
+      return;
+    }
+
+    node.content.descendants(findLinks);
+  }
+
+  findLinks(value);
+  return links;
+}