feat: Implement Streamable-HTTP Client Basic (#168)

* add streamable http transport

* doc

* update

* remove default timeout

* Update streamable_http.go

* add http client

* Update streamable_http.go

* add timeout to close request

* Update http.go

* fix log

Author: leavez

client/http.go

@@ -0,0 +1,17 @@
+package client
+
+import (
+	"fmt"
+
+	"github.com/mark3labs/mcp-go/client/transport"
+)
+
+// NewStreamableHttpClient is a convenience method that creates a new streamable-http-based MCP client
+// with the given base URL. Returns an error if the URL is invalid.
+func NewStreamableHttpClient(baseURL string, options ...transport.StreamableHTTPCOption) (*Client, error) {
+	trans, err := transport.NewStreamableHTTP(baseURL, options...)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create SSE transport: %w", err)
+	}
+	return NewClient(trans), nil
+}