refactor useProfile and useChannelProfile hooks

src/utils/hooks/useProfile.tsx

@@ -0,0 +1,14 @@
+import useSWR from 'swr';
+
+const fetcher = (url: string) => fetch(url).then((r: any) => r.json());
+
+export const useProfile = (pubkey: string) => {
+  const { data, error } = useSWR(`https://rbr.bio/${pubkey}/metadata.json`, fetcher);
+  if (error) {
+    return error;
+  }
+  if (data) {
+    return JSON.parse(data.content);
+  }
+  return null;
+};