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/reducers.ts

@@ -0,0 +1,28 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { Reducer } from 'redux'
+import { combineReducers } from 'redux'
+import { UserReducer } from './user/reducers'
+import { ConfigReducer } from './config/reducers'
+import { HistoryReducer } from './history/reducers'
+import { EditorConfigReducer } from './editor/reducers'
+import { DarkModeConfigReducer } from './dark-mode/reducers'
+import { NoteDetailsReducer } from './note-details/reducer'
+import { RendererStatusReducer } from './renderer-status/reducers'
+import type { ApplicationState } from './application-state'
+import { RealtimeReducer } from './realtime/reducers'
+
+export const allReducers: Reducer<ApplicationState> = combineReducers<ApplicationState>({
+  user: UserReducer,
+  config: ConfigReducer,
+  history: HistoryReducer,
+  editorConfig: EditorConfigReducer,
+  darkMode: DarkModeConfigReducer,
+  noteDetails: NoteDetailsReducer,
+  rendererStatus: RendererStatusReducer,
+  realtime: RealtimeReducer
+})