feat(docs): migrate documentation site into monorepo (#5912)

apps/docs/src/components/widgets/adding.tsx

@@ -0,0 +1,9 @@
+export const AddingWidget = () => {
+  return (
+    <p>
+      You can find how to add the widget on the{" "}
+      <a href="../../getting-started/after-the-installation#embed-integration-data-using-widgets">Widgets</a>{" "}
+      documentation page.
+    </p>
+  );
+};