Print the {html} operation in color

[gabebw]

The Syntect crate looks like a good option: https://docs.rs/syntect/3.2.1/syntect/html/fn.highlighted_html_for_string.html

We don't need every feature, just the html feature: https://github.com/trishume/syntect#feature-flags

It looks like Syntect does not reformat (e.g adding indentation and newlines); it only adds syntax highlighting.

[gabebw]

Or a higher-level crate that's "bat as a library": https://crates.io/crates/prettyprint/0.2.0

[gabebw]

Hmmm, one issue would be if there's another operation besides {html}. Then it's a bit weird to have the HTML colored but the rest of it not colored. Or, maybe that's fine!

In any case, I'd like to have the HTML reformatted into a pretty indented tree no matter what: #8

[gabebw]

People could also just pipe to bat:

curl ... | candle 'html {html}' | bat

[gabebw]

Although, Bat doesn't always detect HTML, so you need to do bat -l html.