UI: Search and read NS API docs in editor tab and documentation tab (#2163)

src/Documentation/root.ts

@@ -1,6 +1,18 @@
-import Root from "./doc/index.md?raw";
 import { AllPages } from "./pages";
+import { EventEmitter } from "../utils/EventEmitter";
 
-export type Document = typeof Root;
+export const getPage = (title: string): string => {
+  const pageContent = AllPages[title];
+  if (pageContent == null) {
+    const errorMessage = `Cannot find ${title} page.`;
+    console.error(errorMessage);
+    return errorMessage;
+  }
+  return pageContent;
+};
 
-export const getPage = (title: string): Document => AllPages[title] ?? Root;
+export const DocumentationPopUpEvents = new EventEmitter<[string | undefined]>();
+
+export function openDocumentationPopUp(path: string): void {
+  DocumentationPopUpEvents.emit(path);
+}