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value receivers with pointer receivers in PacketID methods, expand FixedBitSet size from 8 to 256 bits, and remove outdated documentation files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/edit_book.go

@@ -11,7 +11,7 @@ type EditBook struct {
 	Title string
 }
 
-func (EditBook) PacketID() packetid.ServerboundPacketID {
+func (*EditBook) PacketID() packetid.ServerboundPacketID {
 	return packetid.ServerboundEditBook
 }