fancydialogs: Make InvalidDialogException public

Author: OliverSchlueter

plugins/fancydialogs/src/main/java/com/fancyinnovations/fancydialogs/commands/types/DialogCommandType.java

@@ -48,7 +48,7 @@ public void onInvalidDialog(InvalidDialogException e, BukkitCommandActor actor)
                 .toList();
     }
 
-    static class InvalidDialogException extends InvalidValueException {
+    public static class InvalidDialogException extends InvalidValueException {
         public InvalidDialogException(@NotNull String input) {
             super(input);
         }