update protocol packet definitions: replace value receivers with pointer receivers in PacketID methods, expand FixedBitSet size from 8 to 256 bits, and remove outdated documentation files

pkg/protocol/packet/game/server/jigsaw_generate.go

@@ -12,7 +12,7 @@ type JigsawGenerate struct {
 	KeepJigsaws bool
 }
 
-func (JigsawGenerate) PacketID() packetid.ServerboundPacketID {
+func (*JigsawGenerate) PacketID() packetid.ServerboundPacketID {
 	return packetid.ServerboundJigsawGenerate
 }