Improve Javadocs for corelib/src/main/java/com/ftc9929/corelib/control/ Classes

[markdmatthews]

The javadocs for the classes in corelib/src/main/java/com/ftc9929/corelib/control are not complete. Add class-level, constructor and public methods documentation where required.

See the first few paragraphs of https://www.oracle.com/technical-resources/articles/java/javadoc-tool.html if you're not familiar with the syntax.