init: hgmj server initial commit

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

models/v/adreviewmod/error.go

@@ -0,0 +1,9 @@
+package adreviewmod
+
+// ADReviewNotExistError
+type ADReviewNotExistError struct {
+}
+
+func (ADReviewNotExistError) Error() string {
+	return "review is not exist"
+}