Add collection:list

[y-abs]

What does this PR do ?

This PR implements the collection:list method with its unit tests.

How should this be manually tested?

Clone this branch and run unit tests
./gradlew test

When it succeed, compile it

./gradlew jar

Initiate another java project by adding the compiled SDK as a dependency.

Then, run Kuzzle, create an index nyc-open-data, a yellow-taxi collection.
Finally, run this code

import io.kuzzle.sdk.*;
import io.kuzzle.sdk.Options.KuzzleOptions;
import io.kuzzle.sdk.Options.Protocol.WebSocketOptions;
import io.kuzzle.sdk.Protocol.WebSocket;

import java.util.concurrent.ConcurrentHashMap;

public class listCollection {
    private static Kuzzle kuzzle;

    public static void main(String[] args) {
        WebSocketOptions opts = new WebSocketOptions();
        opts.setAutoReconnect(true).setConnectionTimeout(42000);

        try {
            WebSocket ws = new WebSocket("localhost", opts);

            kuzzle = new Kuzzle(ws, (KuzzleOptions) null);

            kuzzle.connect();

           ConcurrentHashMap<String, Object> result = kuzzle.getCollectionController().list("nyc-open- 
           data").get();
           System.out.println(result);
            
        }  catch (Exception e) {
            e.printStackTrace();
        }

        kuzzle.disconnect();
    }
};

[Aschen]

What is returned when the uninitialized value is returned? The request contain a number or null?

[y-abs]

If its uninitialized it returns null

[scottinet]

I think we should get rid of these optional parameters: kuzzleio/kuzzle#1592

I'd prefer if you remove them, but if you don't, then the default values for the from and size parameters should be null from this SDK's point of view.

[y-abs]

I've didnt see that, thanks