Add run configuration to make things easier

bootstrap/standalone/build.gradle.kts

@@ -26,4 +26,11 @@ tasks.withType<com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar> {
     archiveBaseName.set("Geyser-Standalone")
 
     transform(Log4j2PluginsCacheFileTransformer())
-}
+}
+
+tasks.named<JavaExec>("run") {
+    val dir = projectDir.resolve("run")
+    dir.mkdirs()
+    jvmArgs("-Dio.netty.leakDetection.level=PARANOID")
+    workingDir = dir
+}