Remove meta site

[bsmth]

This PR removes the meta site and migrates older content across from the following pages:

meta
├── legacy
│   ├── adding-images.md            # DONE -> modified media (video) guide
│   ├── archiving.md                # DELETED -> looks obsolete so have omitted
│   ├── code-examples.md            # DONE -> modified Code_examples.md page
│   ├── compat-tables.md            # DONE -> modified Compatibility_tables.md page
│   ├── deployment-timeline.md      # DONE -> modified PR how-to page
│   ├── documentation-priorities.md # DONE -> added new page, we should revisit this!
│   ├── external-content.md         # DELETED -> we can revisit according to review comments
│   └── reuse.md                    # DONE -> modified Attrib_copyright_license.md page
└── writing
    └── style
        └── external-links.md       # DONE -> content already exists in contrib guidelines

Redirects:
I have replaced occurrences of links to mdn-contributor-docs.mozilla.org and manually removed a redirect in files/en-us/_redirects.txt. Please check that this looks okay!

Notes:
Continuing on the work from #20534

TODO:

• merge code-examples.md with Writing_guidelines/Page_structures/Code_examples
• merge compat-tables.md with Writing_guidelines/Page_structures/Compatibility_tables
• merge reuse.md with Attrib_copyright_license
• BCD specific things are now on the bcd repo -> point to docs there
• Remove documentation priorities document
• announce these pages are going
• remove list of deployment times for repos with no automation yet
• Redirect https://mdn-contributor-docs.mozilla.org to https://developer.mozilla.org/en-US/docs/MDN

[nschonni]

https://github.com/mdn/content/blob/main/netlify.toml can also probably go, if you update the web hooks.

[github-actions]

Preview URLs (8 pages)

• /en-US/docs/MDN/Community/Issues/Issue_triage
• /en-US/docs/MDN/Community/Pull_requests
• /en-US/docs/MDN/Contribute
• /en-US/docs/MDN/Writing_guidelines/Attrib_copyright_license
• /en-US/docs/MDN/Writing_guidelines/Howto/Images_media
• /en-US/docs/MDN/Writing_guidelines/Page_structures/Compatibility_tables
• /en-US/docs/MDN/Writing_guidelines/Page_structures
• /en-US/docs/MDN/Writing_guidelines

Flaws (5)

Note! 5 documents with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/MDN/Community/Pull_requests
Title: Pull request guidelines
Flaw count: 2

• broken_links:
  • Anchor not lowercase
  • Can't resolve https://developer.mozilla.org/

---

URL: /en-US/docs/MDN/Writing_guidelines
Title: Writing guidelines
Flaw count: 1

• broken_links:
  • Can't resolve /en-US/docs/MDN/Writing_guidelines/Content_reuse

---

URL: /en-US/docs/MDN/Writing_guidelines/Attrib_copyright_license
Title: Attribution and copyright licensing
Flaw count: 2

• broken_links:
  • Link points to the page it's already on
  • Can't resolve https://developer.mozilla.org/en-US/docs/MDN/About#using_mdn_web_docs_content

External URLs (2)

URL: /en-US/docs/MDN/Writing_guidelines/Howto/Images_media
Title: How to add images and media

• https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/creating-a-pull-request (1 time) (Note! This may be a new URL 👀)
• https://github.github.com/gfm/ (1 time) (Note! This may be a new URL 👀)

(this comment was updated 2022-10-12 12:01:29.877080)

[bsmth]

https://github.com/mdn/content/blob/main/netlify.toml can also probably go, if you update the web hooks.

done in 6b319ff

[dipikabh]

Thanks for this work, @bsmth! 🙌
Pointed out a few nits that could be fixed in the images_media file. I'll resume looking at the other files shortly.

[bsmth]

This is covered here https://developer.mozilla.org/en-US/docs/MDN/Community/Issues/Issue_triage so a new page is not needed but the page itself needs to be reevaluated.

Actually these are two separate documents

• Issue Triage (how to work on issues, references docs prio)
• Documentation Prio (how to tell which docs are high prio)

[Rumyra]

This is amazing @bsmth thank you!!

Just a couple of things after a quick glance:

• BCD specific things are now on the bcd repo, the compatibility table page should just be about the macro and frontmatter
• We have content specific pages for issues and prs in the community section because they differ slightly from other repos in the org (the triage page in meta docs was content specific) - these are pretty much what we are defining now, but the info in the meta page should be captured
• I think we should do away with document priority actually - it'd be nice if all docs were equal (there's more to unpack here)
• Make sure redirects are in place (seems so and we're redirecting redirects but the yari tool should cover that)

[Rumyra]

Also I love how all the tests are failing now - seems we've done good work here 👍

Changes resolved

[dipikabh]

Sorry, I missed looking at an addition. Let me know what you think.

[dipikabh]

Thanks, @bsmth for your work on this project! 🙌

[dipikabh]

Should we redirect https://mdn-contributor-docs.mozilla.org to https://developer.mozilla.org/en-US/docs/MDN?

[bsmth]

Should we redirect https://mdn-contributor-docs.mozilla.org to https://developer.mozilla.org/en-US/docs/MDN?

We can do, indeed. Let me update the request for infra to do this

[bsmth]

Should we redirect https://mdn-contributor-docs.mozilla.org to https://developer.mozilla.org/en-US/docs/MDN?

A redirect is now active for this. We will merge this PR shortly and proceed with decommissioning the Netlify builds & site.

[bsmth]

Merging this one now