refactor(app): move react components to react codebase [EE-3179] (#6971)

app/react/components/PageHeader/HeaderContainer.tsx

@@ -0,0 +1,26 @@
+import { PropsWithChildren, createContext, useContext } from 'react';
+
+import './HeaderContainer.css';
+
+const Context = createContext<null | boolean>(null);
+
+export function useHeaderContext() {
+  const context = useContext(Context);
+
+  if (context == null) {
+    throw new Error('Should be nested inside a HeaderContainer component');
+  }
+}
+
+export function HeaderContainer({ children }: PropsWithChildren<unknown>) {
+  return (
+    <Context.Provider value>
+      <div className="row header">
+        <div id="loadingbar-placeholder" />
+        <div className="col-xs-12">
+          <div className="meta">{children}</div>
+        </div>
+      </div>
+    </Context.Provider>
+  );
+}