Issue caching Result<T> w/ HybridCache

[nwoolls]

Hi there. Love the library. We are use it all over the place and are looking to plug Microsoft's HybridCache in for a bit of caching in hot spots. However, the Value property of a successful Result<T> is null after retrieving it from the cache.

I've reproduced the issue here:

https://github.com/nwoolls/spl-fluentresults-caching-value-lost

Of course we could cache the underlying value, but then we need to essentially turn a failed Result<T> into an exception, handle the exception, and turn it back into a failed Result<T>, which feels a bit tedious if we're OK with caching failed results in some cases.