[docs] many plugin links in doc are broken

[takapiro99]

Summary

In documentation (gatsbyjs.com/docs), a variety of plug-ins have been introduced, but many of the links to them, which like /packages/gatsby-foo-bar are broken. Links to /plugin/gatsby-foo-bar works, so should it be fixed?

I searched over the repo and found 311 links starts with /pakages/gatsby- and probably (and strangely) all of them are broken as of now.

Example:

• gatsby-plugin-typescript link at here

---

Another thing I've found is that request to "gatsbyjs .org" redirects to "gatsbyjs .com",
and links like "gatsbyjs.org/packages/foo" automaticaly redirects to "gatsbyjs.com/plugins/foo."

I don't know the historical background of this site, but if anyone knows, please help.

Motivation

Broken links should be fixed.

Steps to resolve this issue

• change all /packages/*** links to /plugins/*** (probably)

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

Open a pull request

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

[eiselems]

:D Funny that I encountered it yesterday. Tried to partially fix it and now found your Issue/pull request :)

Good that you tackled all occurrences within the docs