Rewrite the fsm component of raft

[sjcsjc123]

• Apply: Implementing log submission operations for raft clusters
• Snapshot: Implementing snapshot operations for raft clusters
• Restore: Implementing storage operations for raft clusters

// fsm implements raft.FSM interface
type fsm struct {
	//implement me
}

func newFSM() raft.FSM {
	return &fsm{}
}

func (f fsm) Apply(log *raft.Log) interface{} {
	//TODO implement me
	panic("implement me")
}

func (f fsm) Snapshot() (raft.FSMSnapshot, error) {
	//TODO implement me
	panic("implement me")
}

func (f fsm) Restore(snapshot io.ReadCloser) error {
	//TODO implement me
	panic("implement me")
}

[saeid-a]

Do we have the structure of the log.Data?

[sjcsjc123]

The initial consideration is to record the information of meta components and corresponding operations. Do you have any ideas?