Cli supports zset data structures (#249)

[halalala222]

1. prevent repeated creation of grpc connections and various command clients to avoid goroutine leaks and reduce the number of goroutines created.

before pr :

use go pprof tools

flyDB client start

run put test test 11 times

after run put test test 11 times

cause by :

The specified call for each gRPC client will create a gRPC connection using grpc.Dial. However, after the call is executed, the connection will not be closed.

example : string put

// newGrpcClient returns a grpc client
func newGrpcClient(addr string) (gstring.GStringServiceClient, error) {
    conn, err := grpc.Dial(addr, grpc.WithTransportCredentials(insecure.NewCredentials()))
    if err != nil {
       return nil, err
    }
    client := gstring.NewGStringServiceClient(conn)
    return client, nil
}

// Put puts a key-value pair into the db by client api
func (c *Client) Put(key string, value interface{}) error {
	client, err := newGrpcClient(c.Addr)
	if err != nil {
		return errors.New("new grpc client error: " + err.Error())
	}
	//...
	return nil
}

after pr :

flyDB client start

run put test test 17 times

after run put test test 17 times

2. cli support zset

note : for ZAdds , Grumble does not support having multiple lists within multiple args,because no args can follow a list. Therefore, it is not possible to implement this functionality.

[github-actions]

Thank you very much for your contribution, we will promptly review your code if there are no errors and pass ci. We will merge your pull request into the master branch.

[qishenonly]

We do not recommend creating consts files for a zset, but please add appropriate comments to the file if necessary.

[halalala222]

To avoid hardcoding strings like 'key' in the codebase,not only for zset other data structures like set,hash, can use for.

[qishenonly]

I know this, so please add comments to it, for example for zset data structures

[halalala222]

I'm sorry, I misunderstood you before. I'll go and modify my code later.

[qishenonly]

Thank you very much for solving potential security vulnerabilities in FlyDB. After we check that your code is correct, we will merge your pr into the main branch tomorrow.