feat: add reactions (#1074)

reaction/action/webhook/response.go

@@ -0,0 +1,12 @@
+package webhook
+
+import (
+	"net/http"
+)
+
+type Response struct {
+	StatusCode      int         `json:"statusCode"`
+	Headers         http.Header `json:"headers"`
+	Body            string      `json:"body"`
+	IsBase64Encoded bool        `json:"isBase64Encoded"`
+}