feat: spec to platform

platform/models/value-objects/avatar.ts

@@ -0,0 +1,7 @@
+import z from "zod";
+
+export const AvatarSchema = z.object({
+  url: z.string().describe("A valid URL pointing to the user's avatar image."),
+});
+
+export type Avatar = z.infer<typeof AvatarSchema>;