Add option to not expose {result, cached} by default

[PodkopovP]

By adding these options, a lot of plugins etc. will not work by default without a fair bit of work, i.e. better-auth, which expects data to be returned as normal. For things like this, you would have to create your own adapter to support the data coming back in a different format.

I'd much rather be able to, either within the config, or methods themselves, pass in an extra key which declares whether the data should be returned directly, or alongside the 'isCached' result.