RoboViz 2.0.0

* update minimum required Java version to 17
* require strings sent via the drawing protocol to be UTF-8 encoded
* update JOGL to 2.4.0 (adds support for macOS Ventura)
* move entire build logic to Gradle (use "./gradlew binDir" instead of
  the old build script)
* add a build task to generate a macOS application bundle
  ("./gradlew macOSApp")
* support running without a present config file
* make the team color table in the configuration window scrollable
* fix a NullPointerException when stopping the log player
* fix an IndexOutOfBoundsException when the connection ends unexpectedly