Put code examples more front-and-center in the README

[masak]

This HN comment made me think.

This seems neat. I love that there are examples front-and-center on the README page. This is exactly what I want and the first thing I would think to put when demonstrating a new language, but sadly this is rare.

We already have code examples of Bel code in the README.md, but they are "below the fold", after

• Title
• A "CI passing" badge
• An informal high-level description
• Getting-started instructions

Suggesting we put the examples directly after the title.

I'm also wondering if there is something we can do to make the examples more impressive, but that's more of a back-burner idea, not something actionable for this issue.