Deprecation Notice: `QuestProvider` and `useQuest`

All uses of QuestProvider and useQuest should be removed and replaced with the shared package @shared/requests. The shared requests package contains more clients than useQuest did, can be used more easily in vanilla JavaScript/Typescript, and doesn't require a provider to be in the React component tree to access it.

Below is a diff showing how to replace useQuest with @shared/requests:

 import React, { useState, useEffect, useRef } from 'react'
 import PropTypes from 'prop-types'
-import { useQuest } from '@rhythm/react-quest'
+import { melodyApi } from '@shared/requests'
 import { TinyMcePreview } from '../../../../../../../../../../../components/TinyMce/TinyMcePreview'

 export const ContentPreview = (props) => {
   const { content, editorHeight = '356px' } = props

-  const { melodyApi } = useQuest()
   const [preview, setPreview] = useState('')
   const isMounted = useRef(true)

Once useQuest is no longer used, QuestProvider can be removed from the component tree.