Add PlayerArmSwingEvent

paper-server/patches/sources/net/minecraft/server/network/ServerGamePacketListenerImpl.java.patch

@@ -1605,7 +1605,7 @@
 +        } // Paper end - Call interact event
 +
 +        // Arm swing animation
-+        PlayerAnimationEvent event = new PlayerAnimationEvent(this.getCraftPlayer(), (packet.getHand() == InteractionHand.MAIN_HAND) ? PlayerAnimationType.ARM_SWING : PlayerAnimationType.OFF_ARM_SWING);
++        io.papermc.paper.event.player.PlayerArmSwingEvent event = new io.papermc.paper.event.player.PlayerArmSwingEvent(this.getCraftPlayer(), org.bukkit.craftbukkit.CraftEquipmentSlot.getHand(packet.getHand())); // Paper - Add PlayerArmSwingEvent
 +        this.cserver.getPluginManager().callEvent(event);
 +
 +        if (event.isCancelled()) return;