Setup allowed-plugins with an example plugin

worldedit-core/src/main/java/com/fastasyncworldedit/core/configuration/Settings.java

@@ -458,7 +458,7 @@ public class Settings extends Config {
                 "Don't bug console when these plugins slow down WorldEdit operations",
                 " - You'll see a message in console if you need to change this option"
         })
-        public List<String> ALLOWED_PLUGINS = new ArrayList<>();
+        public List<String> ALLOWED_PLUGINS = new ArrayList<>(Collections.singleton(("ExamplePlugin")));
         @Comment("Should debug messages be sent when third party extents are used?")
         public boolean DEBUG = true;