* Added GetPacketId method to protocol, implemented for all protocols.
* Moved GetPacketID methods into a single file, alpha-sorted.
* Fixed 1.12.1 HandlePacket switch statement.
* Added SendLogin to the GetPacketId framework.
* Added SpawnObject to GetPacketId framework.
* Added missing sendEntityEquipment packet ID update for 1.12.1
* Added LeashEntity packet ID change to 1.12.1
* Alphabetized packet enum, added SpawnGlobalEntity to GetPacketId framework
* Fixed clang errors
* Indented cases, expanded comment for GetPacketId
* Changed dyslexic comment.
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