Remove remaining package.json named exports causing compat issues

The named package.json exports have caused issues with sinon, react native, bundlers, etc. They are easily replaced by simple object exports that namespace grouped functions. Afterwards, consider adding an eslint rule so the project is free of these in the future.

e.g.:

```ts
export const CryptoUtils = {
randomPin,
randomUuid,
randomBytes,
isWebCryptoSupported,
getJoseSignatureAlgorithmFromPublicKey,
checkValidProperty,
checkRequiredProperty
};
```