feat: introducing react router to nebula web (#973)

* feat: nebula web react-router

* chore: `<HubLayout />`

commands/serve/web/components/Layouts/HubLayout.jsx

@@ -0,0 +1,15 @@
+import React from 'react';
+import { Outlet } from 'react-router-dom';
+import ConnectionSteps from '../Hub/ConnectionSteps';
+import { ThemeWrapper } from '../ThemeWrapper';
+
+const HubLayout = () => {
+  return (
+    <ThemeWrapper>
+      <ConnectionSteps />
+      <Outlet />
+    </ThemeWrapper>
+  );
+};
+
+export default HubLayout;