Explore new Astro features

[stasadev]

Astro adds new features all the time:

• https://astro.build/blog/astro-5/
• https://astro.build/blog/astro-6/
• https://astro.build/blog/astro-7/

But we usually upgrade it without reviewing what's actually new. We should take a look at the new features during upgrades, since some of them could benefit the project.