refactor: package name

app/build.gradle.kts

@@ -34,7 +34,7 @@ java {
 
 application {
     // Define the main class for the application.
-    mainClass = "org.example.App"
+    mainClass = "de.uni_marburg.powersort.App"
 }
 
 tasks.named<Test>("test") {

app/src/main/java/de/uni_marburg/powersort/App.java

@@ -1,11 +1,11 @@
 /*
  * This source file was generated by the Gradle 'init' task
  */
-package org.example;
+package de.uni_marburg.powersort;
 
 public class App {
     public String getGreeting() {
-        return "Hello World!";
+        return "Let's bring Powersort to Java!";
     }
 
     public static void main(String[] args) {

app/src/test/java/de/uni_marburg/powersort/AppTest.java

@@ -1,7 +1,7 @@
 /*
  * This source file was generated by the Gradle 'init' task
  */
-package org.example;
+package de.uni_marburg.powersort;
 
 import org.junit.jupiter.api.Test;
 import static org.junit.jupiter.api.Assertions.*;