[yoga-15] improve service list rendering

yoga-app/src/util/sorting.ts

@@ -0,0 +1,7 @@
+import {YogaSingleService_Plain} from "@/types/generated-strapi-interfaces/api/yoga-single-service";
+
+export function sortServicesByPriority(a: YogaSingleService_Plain, b: YogaSingleService_Plain) {
+  const priorityA = a.priority ?? 0;
+  const priorityB = b.priority ?? 0;
+  return priorityA - priorityB;
+}