refactor: export utils

Author: crimx

src/index.ts

@@ -21,6 +21,8 @@ export { compute, type ComputeFn } from "./compute";
 export { readable, writable, toWritable } from "./readable";
 export { watch, type WatchEffect } from "./watch";
 
+export { isReadable, unsubscribe, identity, strictEqual, arrayShallowEqual } from "./utils";
+
 export {
   reactiveMap,
   type OwnedReactiveMap,

test/signal.test.ts

@@ -5,8 +5,8 @@
 import matchers from "jest-extended";
 import { describe, expect, it, vi } from "vitest";
 
-import { batch, compute, type Get, type Readable, watch, writable } from "../src";
-import { BRAND, isReadable } from "../src/utils";
+import { batch, compute, type Get, type Readable, watch, writable, isReadable } from "../src";
+import { BRAND } from "../src/utils";
 
 expect.extend(matchers);