Add BauSystem module

Fix ci java version
Fix LinkageProcessor

LobbySystem/src/de/steamwar/lobby/particle/elements/Group.java

@@ -0,0 +1,36 @@
+package de.steamwar.lobby.particle.elements;
+
+import de.steamwar.lobby.particle.ParticleData;
+import de.steamwar.lobby.particle.ParticleElement;
+import de.steamwar.lobby.particle.ParticleTickData;
+
+public class Group extends DelegatingParticleElement {
+
+    private final ParticleElement[] rest;
+
+    public Group(ParticleElement particleElement, ParticleElement... rest) {
+        super(particleElement);
+        this.rest = rest;
+    }
+
+    @Override
+    public String attribute() {
+        return null;
+    }
+
+    @Override
+    public void aggregateAttributes(ParticleData particleData) {
+        particleElement.aggregateAttributes(particleData);
+        for (ParticleElement particleElement : rest) {
+            particleElement.aggregateAttributes(particleData);
+        }
+    }
+
+    @Override
+    public void tick(ParticleTickData particleTickData) {
+        particleElement.tick(particleTickData);
+        for (ParticleElement particleElement : rest) {
+            particleElement.tick(particleTickData);
+        }
+    }
+}