Add Cloudflare Workers Sites to the Deployment and Hosting Docs

[exvuma]

Summary

Currently, Cloudflare Workers Sites is not represented on the OSS docs. A good choice for doing so is the deployment and hosting docs.

Content to include:

• Barebone how to install and config wrangler but point to Cloudflare docs for details
• Github action for auto deploys

Motivation

Cloudflare Workers is a great, affordable option for Gatsby sites and we want people in the OSS docs to be aware of it.

Draft the doc

• Write the doc, following the format listed in these resources:
  • Overview on contributing to documentation
  • Docs Templates
  • Example of a similar article: Add Gatsby Cloud to the Deployment and Hosting Docs #21588
• Add the article to the docs sidebar under the [parent doc] section.

Open a pull request

• Open a pull request with your work including the words "closes #[this issue's number]" in the pull request description

[exvuma]

I'd like to take this issue :)

[TylerBarnes]

@victoriabernard92 this sounds like a good addition to the docs! CC @gatsbyjs/learning