Blog posts vs newsletter

Sorting out of blog posts/news pages/newsletter(s) page and corresponding buttons.

• 👉 Main page
• 👉 Newsletter page
• 👉 Blog posts page

---

• Reduce number of buttons on front page to the necessary
• Rename "News posts" to more general "blog posts", as discussed long ago in VC Comm, since not all posts are actually "news", but instead reports, tutorials, whatever.
• Cross-reference blog posts page and newsletter page
• Provide more explicit description on what can be subscribed to

Note: There was an old MR on this already, outdated & different focus.