Rexport types for servers (#409)

* Include "macros" in the "server" feature

* Re-export SubscriptionSink

* Include the "types" feature in both the "client" and "server" features
Export types::* from façade when the "types" is active
Export types::* from servers

* fmt

* Export jsonrpsee_types under types

* fmt

* broken doc link

* fix benches

* fmt

* Fix test imports