[LTS] The Security Update

• Upgrade Log4J to 2.16.0
• Upgrade to Java 16
• Add Macro Creator
• Now using the GPL-3.0 License
• Refactor de.gamingcraft to org.utilityclient
• Remove addons
• Made jar file liter
• Upgrade all dependencies
• Fix exception spam caused by newer worlds
• Add config entry for overlay background