SPIGOT-4204: Allow passing data to AreaEffectCloud particles

By: md_5 <git@md-5.net>

paper-api/src/main/java/org/bukkit/entity/AreaEffectCloud.java

@@ -132,6 +132,15 @@ public interface AreaEffectCloud extends Entity {
      */
     void setParticle(Particle particle);
 
+    /**
+     * Sets the particle which this cloud will be composed of
+     *
+     * @param particle the new particle type
+     * @param data the data to use for the particle or null,
+     *             the type of this depends on {@link Particle#getDataType()}
+     */
+    <T> void setParticle(Particle particle, T data);
+
     /**
      * Sets the underlying potion data
      *