Table of supported functionality

[Fire-Dragon-DoL]

Apparently, ristretto doesn't support "Loadable" cache, Bigcache doesn't support anything but byte values and freecache doesn't support anything but byte keys and values.

Some of the examples in the README are wrong, using strings for these stores but actually failing with an error.

I'm thinking maybe a grid of "features supported" per store could help understanding what can and cannot be used.

[iamgoroot]

Marshaller doesn't mix with other interfaces either. Makes little sense to wrap typed code into untyped one just to save to redis (which also apparently supports only strings)

I don't think this project needs table like this but proper v5 upgrade with better interface compatibility