Pixiv support refresh token login

[xb2016]

该 PR 相关 Issue / Involved issue

Close #6883

完整路由地址 / Example for the proposed route(s)

NOROUTE

新RSS检查列表 / New RSS Script Checklist

• 这个PR中包含了新的路由吗? Does this PR add new route?
  • 如果有, 请完成检查列表. If yes, please finish the check list
  • 如果你的PR符合下方某个事项, 也请注明. If any of the checklist item meets your PR, please fill it out.
  • <- 这样打勾
• 是否提供了文档? Documentation provided?
  • 是否提供了英文文档? EN Documentation provided?
• 是否支持全文获取? Is this RSS Script support fulltext?
  • 如果全文获取中需要访问文章链接, 是否使用了缓存? If fulltext requires to fetch detail pages, is cache used in the process?
  • 缓存说明 | How to use cache
• 目标是否有明显的反爬/频率限制? Is there any sign of anti-bot or rate limit?
  • 如果有, 是否有对应的措施? (延长缓存时间, 写文档说明, etc.) If yes, do your code reflect this sign? (e.g. write documentations, use long cache time)
• 是否引入的新的包? Any new package introduced?
  • 如果有, 请说明原因. If yes, please state your reason
• 是否使用了Puppeteer? Make use of Puppeteer?
  • 如果有, 请说明原因. If yes, please state your reason

说明 / Note

[vercel]

This pull request is being automatically deployed with Vercel (learn more).
To see the status of your deployment, click below or on the icon next to each commit.

🔍 Inspect: https://vercel.com/diy/rsshub/jjwmhsldu
✅ Preview: https://rsshub-git-fork-xb2016-master.diy.now.sh

[NeverBehave]

请同时修改英文版文档

[xb2016]

请同时修改英文版文档

已修改

[z775729168]

文档中的变量是“PIXIV_PIXIV_REFRESHTOKEN”，应该是“PIXIV_REFRESHTOKEN”。