fix required version

required java 21

made a different implementation approach to authlib

required java 21

port version for 1.20.2

port version for 1.16

port version for 1.18

port version for 1.17

Now the skin is visible for clean clients

Add config file

• can enable skin Ely clients for clean clients.
• can enable skin non Ely clients for Ely clients.
• can change check url for non clear clients.

Now uuid from different systems cannot be the same