Add BauSystem module

Fix ci java version
Fix LinkageProcessor

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

@@ -0,0 +1,23 @@
+package de.steamwar.lobby.particle.elements;
+
+import de.steamwar.lobby.particle.ParticleElement;
+import de.steamwar.lobby.particle.ParticleTickData;
+
+public class Floor extends DelegatingParticleElement {
+
+    public Floor(ParticleElement particleElement) {
+        super(particleElement);
+    }
+
+    @Override
+    public String attribute() {
+        return "PARTICLE_ATTRIBUTE_FLOOR";
+    }
+
+    @Override
+    public void tick(ParticleTickData particleTickData) {
+        if (!particleTickData.getWorld().getBlockAt(particleTickData.getPlayer().getLocation().subtract(0, 0.5, 0)).getType().isAir()) {
+            particleElement.tick(particleTickData);
+        }
+    }
+}