Add method isTickingWorlds to Bukkit (#8316)

Co-authored-by: Shane Freeder <theboyetronic@gmail.com>

Also, restores un/loading worlds mid tick. This will not be officially supported API contract that such a routine is safe, and these restrictions may be restored in the future.

patches/api/0385-Add-Player-getFishHook.patch

@@ -1,24 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: u9g <git@u9g.dev>
-Date: Tue, 14 Jun 2022 19:35:21 -0400
-Subject: [PATCH] Add Player#getFishHook
-
-
-diff --git a/src/main/java/org/bukkit/entity/HumanEntity.java b/src/main/java/org/bukkit/entity/HumanEntity.java
-index 29885c7184dbec82a6de69c39878276392779d71..3b204144e2d245098b3dc23b8779f9ed817bb6d1 100644
---- a/src/main/java/org/bukkit/entity/HumanEntity.java
-+++ b/src/main/java/org/bukkit/entity/HumanEntity.java
-@@ -356,6 +356,13 @@ public interface HumanEntity extends LivingEntity, AnimalTamer, InventoryHolder
-     @Nullable
-     public Location getPotentialBedLocation();
-     // Paper end
-+    // Paper start
-+    /**
-+     * @return the player's fishing hook if they are fishing
-+     */
-+    @Nullable
-+    FishHook getFishHook();
-+    // Paper end
- 
-     /**
-      * Attempts to make the entity sleep at the given location.