Dev Blog migration issues

[mDuo13]

• [ ] The old site had landing pages for each year, at https://xrpl.org/blog/2022/ for example, showing posts only from that year. The new site currently shows a 404 at those URLs.
• [ ] Similarly, label landing pages like https://xrpl.org/blog/label/rippled-release-notes.html are currently 404s instead of redirecting to something useful.
• [x] Blog posts from 2014–2019 don't have the appropriate metadata indicating post categories and date (and turning off the GitHub edit button). The metadata for these is in the dactyl-config.yml file of Ripple's old, private dev-blog repo, and should be moved to the frontmatter of the new blog. (Fixed in #2512)
• [x] The dev blog area of the site has custom navigation that kind of mirrors the top nav of the blog prior to the Redocly migration, but this is pointless. The blog navigation being different from the rest of xrpl.org wasn't an intentional choice, but the result of the blog repo not being updated from the previous design (it used to match). (Fixed in #2512)