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>

src/hooks/common/use-base-url.tsx

@@ -1,33 +0,0 @@
-/*
- * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
- *
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-import { useContext, useMemo } from 'react'
-import { useRouter } from 'next/router'
-import { baseUrlContext } from '../../components/common/base-url/base-url-context-provider'
-
-export enum ORIGIN {
-  EDITOR,
-  RENDERER,
-  CURRENT_PAGE
-}
-
-/**
- * Provides the base urls for the editor and the renderer.
- */
-export const useBaseUrl = (origin = ORIGIN.CURRENT_PAGE): string => {
-  const baseUrls = useContext(baseUrlContext)
-  if (!baseUrls) {
-    throw new Error('No base url context received. Did you forget to use the provider component?')
-  }
-
-  const router = useRouter()
-
-  return useMemo(() => {
-    return (router.route === '/render' && origin === ORIGIN.CURRENT_PAGE) || origin === ORIGIN.RENDERER
-      ? baseUrls.renderer
-      : baseUrls.editor
-  }, [origin, baseUrls.renderer, baseUrls.editor, router.route])
-}