Remove Java dependency for HTML linting

[kjhollen]

Increasing Access

Removing the Java dependency for HTML linting would make it easier for people to build the website on their own machines—it would be one less possible point of failure. This would also make it easier to automate building and deploying the website to Google Cloud, where we hope to migrate the site in the future.

Most appropriate sub-area of p5.js?

Other (specify if possible)

Feature request details

Remove or reconfigure the htmllint build step so that Java is not a dependency. npm install should install all needed dependencies for building the site.

[limzykenneth]

Removing the need for Java would be great! @kjhollen Would you like to explore this and make a PR when you are done? htmlhint seems like a possible replacement.