convert to .md and keep updated with english version

[yin1999]

• update the unused URI.
• replace links which reference to to localized page.
• add example 逐行处理文本文件

[github-actions]

Preview URLs

• https://pr3185.content.dev.mdn.mozit.cloud/zh-CN/docs/Web/API/Fetch_API/Using_Fetch

Flaws

URL: /zh-CN/docs/Web/API/Fetch_API/Using_Fetch
Title: 使用 Fetch
on GitHub
Flaw count: 18

• macros:
  • /zh-CN/docs/Web/API/GlobalFetch/fetch redirects to /zh-CN/docs/Web/API/fetch
  • /zh-CN/docs/Web/API/GlobalFetch/fetch redirects to /zh-CN/docs/Web/API/fetch
  • /zh-CN/docs/Web/API/GlobalFetch/fetch redirects to /zh-CN/docs/Web/API/fetch
  • /zh-CN/docs/Web/API/GlobalFetch/fetch redirects to /zh-CN/docs/Web/API/fetch
  • /zh-CN/docs/Web/API/GlobalFetch/fetch redirects to /zh-CN/docs/Web/API/fetch
  • and 13 more flaws omitted

External URLs

URL: /zh-CN/docs/Web/API/Fetch_API/Using_Fetch
Title: 使用 Fetch
on GitHub

• https://fetch.spec.whatwg.org/ (2 times) (Note! This may be a new URL 👀)
• https://github.com/github/fetch (2 times) (Note! This may be a new URL 👀)
• Make fetch() use "same-origin" credentials by default whatwg/fetch#585 (1 time) (Note! This may be a new URL 👀)

(this comment was updated 2021-11-23 04:54:45.000200)

[irvin]

this will merge on #3189

[yin1999]

Thanks, closing this PR now.