Move all backends into backend directory

backend/yandex/api/files_resource_list.go

@@ -0,0 +1,8 @@
+package src
+
+// FilesResourceListResponse struct is returned by the API for requests.
+type FilesResourceListResponse struct {
+	Items  []ResourceInfoResponse `json:"items"`
+	Limit  *uint64                `json:"limit"`
+	Offset *uint64                `json:"offset"`
+}