feat: Entity#teleportAsync method with TeleportFlags (#10371)

* feat: Entity#teleportAsync method with TeleportFlags

* use method-local class

---------

Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>

patches/server/Expose-Tracked-Players.patch

@@ -9,10 +9,11 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 --- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
 +++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
 @@ -0,0 +0,0 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
-     public boolean isTicking() {
          return getHandle().isTicking();
      }
+     // Paper end - isTicking API
 +
++    // Paper start - tracked players API
 +    @Override
 +    public Set<org.bukkit.entity.Player> getTrackedPlayers() {
 +        if (this.entity.tracker == null) {
@@ -25,5 +26,5 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        }
 +        return set;
 +    }
-     // Paper end
++    // Paper end - tracked players API
  }