CSS for buttons is inconsistent

[cscheid]

Repro:

---
title: Button Style Inconsistency
---

```{ojs}
viewof foo = Inputs.button("OJS Button")
```

<button>Plain Button</button>

Yuck.

[cscheid]

Changing the CSS so that button elements take the same style as OJS buttons interacts badly with code-link button elements.

A workaround for now is to use <button class="btn btn-quarto">foo</button> instead.

Maybe this is where a quarto {{< button >}} shortcode could be useful.