Armor trims and unreachable code fix

[ImSpooks]

• Added support for Armor Trims
• Changed attribute modifier to use doubles instead of integers
  • This has been a double ever since it was implemented in spigot 1.9
• Fixed unreachable code in XItemStack
  • the following code would never reach when the server is on version 1.17 or higher, same goes for the other if checks below: https://github.com/CryptoMorin/XSeries/blob/6cbc1fc226f2eb0463700626e9f5db58f96ba339/src/main/java/com/cryptomorin/xseries/XItemStack.java#L779
  • Same applies here: https://github.com/CryptoMorin/XSeries/blob/6cbc1fc226f2eb0463700626e9f5db58f96ba339/src/main/java/com/cryptomorin/xseries/XItemStack.java#L305

[CryptoMorin]

Thank you so much