Initial project structure

[Codestech1]

Adds an initial gradle project and packet structure.

[Codestech1]

Modifying this pull request to create a non-breaking API via interfaces

[Codestech1]

Serializing NBT text components is not possible for now, because kyori has not a serializer for them yet.
KyoriPowered/adventure#995

[Window5000]

We should create an event system and integrate it with the packet system before merging, ie. the Packet class should extend Event.

Small thing:
if fx. B Event extends A event, then when B is called it should also call A event

[Window5000]

ie calling an event should also call its parents

[Codestech1]

We should create an event system and integrate it with the packet system before merging, ie. the Packet class should extend Event.

Small thing: if fx. B Event extends A event, then when B is called it should also call A event

The goal for now was achieving a working connection between server and client and a basic packet system.
Wouldn't it be better to make an event system in another PR?

[Window5000]

well fx. the requeststatus packet will call an event, which will send an respondstatus packet instead of it comming directly from the other packet

[Codestech1]

well fx. the requeststatus packet will call an event, which will send an respondstatus packet instead of it comming directly from the other packet

I could start making an event system now, but in another PR.