fix(http-client): expose types to allow naming HttpClient with middleware

Exposes RpcService, HttpBackend, HttpTransportClient, RpcLogger, RpcLoggerLayer, RpcServiceBuilder, and RpcServiceT at the crate root to allow users to name the HttpClient type when middleware is applied.

Closes #1590

Author: soul022

client/http-client/src/lib.rs

@@ -57,6 +57,10 @@ pub type HttpRequest<T = HttpBody> = jsonrpsee_core::http_helpers::Request<T>;
 /// HTTP response with default body.
 pub type HttpResponse<T = HttpBody> = jsonrpsee_core::http_helpers::Response<T>;
 
+pub use jsonrpsee_core::middleware::{RpcServiceBuilder, RpcServiceT};
+pub use jsonrpsee_core::middleware::layer::{RpcLogger, RpcLoggerLayer};
+pub use transport::{HttpBackend, HttpTransportClient};
+
 /// Custom TLS configuration.
 #[cfg(feature = "tls")]
 pub type CustomCertStore = rustls::ClientConfig;