Deprecate Streamly.Prelude

[harendra-kumar]

In the new release the monomoprhically typed serial stream module Streamly.Data.Stream would replace Streamly.Prelude. Other stream types can be used by importing the corresponding monomorphically typed modules. Once all the functionality of Streamly.Prelude is transferred to these other modules and we have created the Streamly.Data.Stream and other stream modules (e.g. Streamly.Data.Stream.Async) then we can deprecate it.