refactor: Edited help command

Prepared for unit test, output message is now hardcoded

src/main/java/org/bitbiome/commands/HelpCommand.java

@@ -10,13 +10,14 @@ public class HelpCommand implements CommandAPI {
 
     @Override
     public void performCommand(Scanner scanner, boolean isRunning, String message) {
-        HashMap<String, CommandAPI> commands = Boot.instance.getCmdListener().returnCommands();
+        System.out.println(getHelpMessage());
+    }
+
+    public static String getHelpMessage() {
         StringBuilder outputMessage = new StringBuilder();
-        outputMessage.append("Hier ist eine Liste der Commands:\n");
-        commands.forEach((key, value) -> {
-            outputMessage.append("- ").append(key).append("\n");
-        });
-        System.out.println(outputMessage.toString());
+        outputMessage.append("Hier ist eine Liste der Commands:\n").append("- help -> Gibt diese Nachricht aus\n").append("- exit/quit -> Beendet das Spiel\n");
+
+        return outputMessage.toString();
     }
 
 }