use paper plugin loader to avoid maven central warning

core/src/main/resources/plugin.yml

@@ -10,4 +10,7 @@ commands:
   iris:
     aliases: [ ir, irs ]
 api-version: '${apiVersion}'
-hotload-dependencies: false
+hotload-dependencies: false
+
+paper-plugin-loader: ${loader}
+paper-skip-libraries: true