Syntax highlighting on Github Pages

[Julian Reif]

GitHub Pages has integrated my Stata lexer into their platform. Any code labeled as "Stata" on your GitHub Pages site will now automatically feature syntax highlighting:

```stata
regress y x
```

Here is a demo of the highlighter, which was written using Rouge:
https://rouge.jneen.net/v4.3.0/stata/

Here is an example of a Github Pages website that uses the highlighter. It is styled using the "thankful_eyes" theme:
https://julianreif.com/guide/

The lexer code is available on Github.