Better code splitting and removed final instances of react-dnd

src-web/components/core/Editor/LazyEditor.tsx

@@ -0,0 +1,13 @@
+import type { EditorView } from '@codemirror/view';
+import { forwardRef, lazy, Suspense } from 'react';
+import type { EditorProps } from './Editor';
+
+const Editor_ = lazy(() => import('./Editor').then((m) => ({ default: m.Editor })));
+
+export const Editor = forwardRef<EditorView, EditorProps>(function LazyEditor(props, ref) {
+  return (
+    <Suspense>
+      <Editor_ ref={ref} {...props} />
+    </Suspense>
+  );
+});