Vlad Chira's PathPlanner with some little changes.

• removed module-info.java (that thing doesn't play well with gradle - or it is past my abilities to make it work)
• added gradle scripts
• removed javafx app as this is meant to be a library for use in FTC and having a runtime dependency on javafx doesn't sound great
• pom.xml removed since it may confuse IDEs when found alongside gradle scripts