FastShop - Unique shop system v1.3.6

1. ADDED A NEW LICENSE SYSTEM, request a new license key first before adding the plugin.
2. Made the fun tool much better and nice looking, and can actually use it to fly around.
3.. Fixed the self-destruct not working on fireworks.
4. Fixed the normal firework tool being removed if used with elytra.
and more...

1. Fixed the worldguard item-drop bypass.

1. Added worldguard support, so now it makes a check if you can drop an item or not.

1. Made it support double placeholders for shards.

1. Added support for Leaf 1.21.11+

1. Made it support %player% and %amount% in the shards commands.
2. Made it execute the commands on the main thread.
3. The GUI runs async now.
4. Made it so you can drop items by clicking outside of inventory.

1. Made it so you can drop items, stack, drag in the below inventory, etc..
2. Fixed the invalid sound from default config.

1. Fixed the problem with shard economy not registering unless you have Pikz plugin installed.