feat(ImageToText): add ImageToText task support

tasks.go

@@ -1,5 +1,9 @@
 package sati
 
+import (
+	"encoding/base64"
+)
+
 type AnyTask interface {
 	serialize() task
 	Result() any
@@ -101,3 +105,26 @@ type GeeTest3Result struct {
 	Validate  string `json:"validate"`
 	Seccode   string `json:"seccode"`
 }
+
+type ImageToTextTask struct {
+	Image []byte `json:"-"`
+	Type  string `json:"type"`
+}
+
+func (t *ImageToTextTask) serialize() task {
+	return task{
+		Type: "ImageToText",
+		Data: map[string]string{
+			"image": base64.RawStdEncoding.EncodeToString(t.Image),
+			"type":  t.Type,
+		},
+	}
+}
+
+func (t *ImageToTextTask) Result() any {
+	return &ImageToTextResult{}
+}
+
+type ImageToTextResult struct {
+	Result string `json:"result"`
+}