feat: add raw task support

tasks.go

@@ -128,3 +128,15 @@ func (t *ImageToTextTask) Result() any {
 type ImageToTextResult struct {
 	Result string `json:"result"`
 }
+
+type RawTask task
+
+func (t *RawTask) serialize() task {
+	return task(*t)
+}
+
+type RawTaskResult map[string]any
+
+func (t *RawTask) Result() any {
+	return RawTaskResult{}
+}