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value receivers with pointer receivers in PacketID methods, expand FixedBitSet size from 8 to 256 bits, and remove outdated documentation files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

@@ -1,9 +1,5 @@
 package client
 
-import "github.com/Tnze/go-mc/server/command"
-
 //codec:gen
 type Commands struct {
-	Nodes     []command.Node
-	RootIndex int32 `mc:"VarInt"`
 }