Fix(useScript): Prevent infinite loops caused by unstable props

The `useScript` hook was susceptible to infinite re-render loops if
unstable references (e.g., inline functions or object literals) were
passed for `onReady`, `onError`, or `otherProps`. This was because
these props were included in the dependency array of the main `useEffect`
hook, causing it to re-run on every render if the parent component
provided new references.

This commit addresses the issue by:
1. Wrapping `onReady`, `onError`, and `otherProps` in `React.useRef`.
   This ensures that their latest values are accessible within the
   hook's effects and callbacks without causing re-runs if the
   underlying values haven't changed.
2. Updating the dependency arrays of `useEffect` and `useCallback`
   hooks to rely on these stable refs or their `.current` values where
   appropriate. `handleOnLoad` and `handleOnError` now have empty
   dependency arrays as they access props via refs.

Additionally, test cases have been added in `src/index.test.tsx` to
specifically verify that the hook behaves correctly when unstable props
are provided, ensuring the script is loaded only once and no infinite
loops occur. Both success and error paths for script loading are tested
under these conditions.

Author: google-labs-jules[bot]

jest.config.js

@@ -0,0 +1 @@
+module.exports = { preset: 'ts-jest', testEnvironment: 'jsdom', setupFilesAfterEnv: ['@testing-library/jest-dom/extend-expect'] };