chore: update example

README.md

@@ -11,13 +11,38 @@ Inspired by [Retrofit] and [Refit] to bring something like them to rust.
 ## Example
 
 ```rust
+#[derive(Deserialize, Serialize, Clone)]
+pub struct HttpBinResponse {
+  pub url: String,
+}
+
 #[retroqwest::retroqwest]
 pub trait HttpBin {
-  #[get::json("/anything")]
+  #[http::get("/anything")]
   async fn get_anything(&self) -> Result<HttpBinResponse, RetroqwestError>;
 
-  #[get::json("/anything/{name}")]
+  #[http::get("/anything/{name}")]
   async fn get_by_name(&self, name: String) -> Result<HttpBinResponse, RetroqwestError>;
+
+  #[http::post("/anything/{name}")]
+  async fn post_to_name(
+    &self,
+    name: String,
+    #[query] q: bool,
+    #[json] body: &HttpBinResponse,
+  ) -> Result<HttpBinResponse, RetroqwestError>;
+}
+
+impl HttpBinClient {
+  pub fn new(base_uri: String) -> Result<Self, RetroqwestError> {
+    Self::from_builder(base_uri, ClientBuilder::default())
+  }
+}
+
+// This method allows for better code completion
+// since `impl HttpBin` is better than the generated struct...
+fn build_client(uri: String) -> Result<impl HttpBin, retroqwest::RetroqwestError> {
+  Ok(HttpBinClient::new(uri)?)
 }
 ```