Itsacoyote quick fixes

[itsacoyote]

Resolves DEVRL-690, DEVRL-691, DEVRL-627, DEVRL-649, DEVRL-692

• https://linear.app/matterlabs/issue/DEVRL-692/fix-improperly-formatted-links
• https://linear.app/matterlabs/issue/DEVRL-649/small-ify-buttons
• https://linear.app/matterlabs/issue/DEVRL-627/change-url-for-dev-updates-card
• https://linear.app/matterlabs/issue/DEVRL-691/remove-a-link-to-zksync-erareleases-see-whats-new-in-2420-from-docs
• https://linear.app/matterlabs/issue/DEVRL-690/move-cards-on-build-to-bottom-of-the-page

List of changes

• added links to breadcrumbs
  • added redirects for certain paths that don't have an index page
• fixed links that were improperly formatted for Nuxt Content
• adjusted some buttons that were too large
• update Dev Updates card on landing page to point to zksyncDevs twitter account
• remove the version update link in the hero section of the landing page
• moved cards on the Build index page down to the bottom of the page

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit aaafad4):

https://zksync-docs-staging-5eb09--pr83-itsacoyote-quick-fix-rpjokzkb.web.app

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[itsacoyote]

I tested some of the links and they worked, having an automated dead link checker might be nice. The other changes seem small

Nuxt Content does a pretty good job of checking internal links for anything that's broken. I think we've got another link checker elsewhere in the git workflow that also checks links in another way.