feat: implement caldav search

vendor/github.com/dolanor/caldav-go/http/response.go

@@ -0,0 +1,18 @@
+package http
+
+import (
+	"net/http"
+)
+
+// an HTTP response object
+type Response http.Response
+
+// downcasts the response to the native HTTP interface
+func (r *Response) Native() *http.Response {
+	return (*http.Response)(r)
+}
+
+// creates a new HTTP response object
+func NewResponse(response *http.Response) *Response {
+	return (*Response)(response)
+}