CI/infra/admin improvements - 2024/09

[chalin]

• [CI] Report an error when URLs are missing from an integrations registry entry #5107
• [infra] Update NPM packages #5265
• [CI] Update package.json: tweak script and minor pkg vers update #5313
• Define and enforce a policy for introducing redirects when site pages are deleted #668
• Make build and CI more contributor friendly #2448
• CI: refcache update policy and cron-job proposal #2554 - or at least document the currently manual process
• Post specs update: address 404s and reenabled all checks #3392
• [CI] Clean out page-local dictionnaires #3759
• [CI] Support htmltest config from doc-page front matter #3889
• [CI] Warning about links with inappropriate text like "here" #3898
• [CI/textlint] Enforce "autoinstrument*" as a single word #3904
• [CI] Check links in README etc #3920
• The "Create documentation issue" should add more context to generated issue #3934
• [CI] check links to resources in OTel org repos #3994
• Redirect layout rework and fixes #4899
• [infra] Consider displaying future pages like blog post and announcements, at least conditionally #5016
• [infra] Enforce a character limit on explicit or implicit linkTitle #5152
• Upgrade to Hugo 0.134.x -- possible breaking changes #5153

Other:

• CI/infra CI & infrastructure in particular see if any of the older issues can be closed.
• Issues closed in Sept: https://github.com/open-telemetry/opentelemetry.io/issues?q=label%3ACI%2Finfra+closed%3A2024-09-01..2024-09-30
• Previous: CI/infra/admin improvements - 2024/03 to 08 #4083
• [infra] Consider identifying the source of JSBUILD failure Could not resolve "path" #3737
• Carried over from CI improvements - 2023/10 #3218:
  • [CI] Refactor/rework custom trim-code-block-and-unindent markdownlint rule #3183
  • Consider saving the generated website using the artifact action, and passing that along to the link checker