Remove site:run goal in order to reduce amount of dependencies #1240
Description
New feature, improvement proposal
The mojo https://github.com/apache/maven-site-plugin/blob/master/src/main/java/org/apache/maven/plugins/site/run/SiteRunMojo.java depends on Jetty. However in most cases the site doesn't need to be served via a web server but can be used directly from the filesystem with a browser.
Particularly as the "run" goal only renders documents once (but has no hot reload/rerender capabilities).