feat: stripe handlers and fetchers

packages/lib/stripe/fetchers/get-subscription.ts

@@ -0,0 +1,14 @@
+import { GetSubscriptionResponse } from "../handlers/get-subscription";
+
+export const fetchSubscription = async () => {
+  const response = await fetch("/api/stripe/subscription", {
+    method: "GET",
+    headers: {
+      "Content-Type": "application/json",
+    },
+  });
+
+  const json: GetSubscriptionResponse = await response.json();
+
+  return json;
+};