ProbeJS Legacy 6.0.2 -> 6.0.3

probejs_legacy as mod id

• Add an icon to ProbeJS Legacy mod file
• For 1.20.1, the main mod id was accidentally set to probejs during 6.0.0 update, which has now been changed back to probejs_legacy. For 1.16.5, you can use both probejs and probejs_legacy to check ProbeJS Legacy
• [1.20.1] Original ProbeJS will now be marked as incompatible
• [1.16.5] Fix KubeJS loading plugin multiple times when multiple mods are declared within one mod file
  • In theory this should be done by KubeJS itself, but KubeJS for 1.16 has long been dead
• improve filtering for methods that override methods in parent classes