fix: Move content into to frontend directory

Doing this BEFORE the merge prevents a lot of merge conflicts.

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

frontend/src/redux/store-provider.tsx

@@ -0,0 +1,19 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { PropsWithChildren } from 'react'
+import React from 'react'
+import { Provider } from 'react-redux'
+import { store } from './index'
+
+/**
+ * Sets the redux store for the children components.
+ *
+ * @param children The child components that should access the redux store
+ */
+export const StoreProvider: React.FC<PropsWithChildren<unknown>> = ({ children }) => {
+  return <Provider store={store}>{children}</Provider>
+}