Archiving `@vercel/fetch`

[Ethan-Arrowood]

We will be archiving this repository in favor of fetch in Node.js. Existing versions will not be deprecated and can be continued to be used. This project has worked well, but with the latest options from Node.js, we believe it’s now sufficient to replace this library.

The native Fetch within Node.js (vendored from Undici) is more spec-compliant than the default node-fetch this library ships. Plus, it utilizes a keep-alive agent by default. Retry logic is coming soon and other libraries exist to fill this need if you are looking to implement it yourself (such as async-retry).

Thank you to all the community contributions!