good first issuenew feature
説明
JSON is the dominant exchange format for REST API.
However, Armeria's WebClient does not provide any JSON-specific APIs.
I believe it should be useful additions if we provide:
WebClient client = WebClient.of();
// Send a serialized JSON object with "applicaiton/json"
HttpResponse response = client.postJson("/items", new MyItem());
HttpResponse response = client.putJson("/items", new MyItem());
HttpResponse response = client.patchJson("/items", new MyItem());
HttpResponse response = client.prepare()
.post("/items")
.contentJson(new MyItem())
.execute();