Extract entry points from HTML files.
Parses <script src="..."> and <link rel="stylesheet" href="..."> tags
using Floki to discover JS and CSS entry files.
Example
# index.html
<script type="module" src="js/app.ts"></script>
<link rel="stylesheet" href="css/app.css">
{:ok, entries} = Volt.HTMLEntry.extract("index.html")
entries.scripts #=> ["js/app.ts"]
entries.styles #=> ["css/app.css"]