feat: create index files for hooks and main exports

Author: pedroab0

src/hooks/index.ts

@@ -0,0 +1,4 @@
+export { useStableKey } from "./useStableKey";
+export { useSWRCreate } from "./useSWRCreate";
+export { useSWRDelete } from "./useSWRDelete";
+export { useSWRUpdate } from "./useSWRUpdate";

src/index.ts

@@ -0,0 +1,4 @@
+export * from "./errors";
+export * from "./hooks";
+export * from "./types";
+export * from "./utils";