Add packetevents support (as protocollib rn)

[lokspel]

What feature do you want to see added?

As title says

Are there any alternatives?

https://github.com/retrooper/packetevents

Anything else?

It seems to be better for performance.

[Xephi]

Please describe what you're expecting from AuthMe to do with PacketEvents

[lokspel]

Please describe what you're expecting from AuthMe to do with PacketEvents

Same as protocollib, for example, inventory hider or tab-complete thingy,
https://github.com/AuthMe/AuthMeReloaded/tree/master/src/main/java/fr/xephi/authme/listener/protocollib

[sgdc3]

Yep we should move away from ProtocolLib, using PacketEvents for packet handling will be easier to maintain

[Xephi]

Need to be tested
#2982