[EPIC] Unified Documentation Part 2

[pedro-psb]

The goal of this EPIC is to make the new Pulp Docs site production-ready and publish it under https://pulpproject.org/.

Community Post: https://discourse.pulpproject.org/t/unified-documentation-part-2/1188 Previous Epic: https://github.com/pulp/pulpcore/issues/5037

First Step

• [x] [CI] #31
• [x] [misc] #33
• [x] [misc] #32 (rst repos)

Second Step

• [x] [pulp-docs] #20
• [x] [pulp-docs] #9
• [x] [pulp-docs] https://github.com/pulp/pulp-docs/issues/40

Last Step

• [x] [publish] Publish promote staging-docs.pulpproject to pulpproject.org
• [x] [publish] Add redirects to pulpproject.org

Nice to Have

• [publish] Use latest released versions of each repository instead of main
• [content] General Review: fix internal links, image links, and general rendering issues (all repos)
• [pulp-docs] Improve Repository Map table (e.g, w/ correct versions)
• [pulp-docs] Add toc-summary on plugins index page (to get quicker overview of all content)
• [content] Main "getting started" tutorial
• [content] Installation docs in oci-images
• [content] Merge content from pulpproject.org into docs
• [pulp-docs] #34
• [CI] https://github.com/pulp/pulpcore/issues/5085 (nice-to-have)

[pedro-psb]

Core task are done. Nice-to-haves will be done as demanded