SSR Support for Core API

[futursolo]

#13 delivers SSR Support for Helmet API and Query API whilst this issue aims to provide SSR support for the Core API.

This is not included in #13 as SSR is mostly useful with public facing pages which are indexed by SEO.
States in those pages are usually obtainable from client-sided states.

[futursolo]

An atom / slice should be able to be marked as #[bounce(transitive)], this allows their values to be set with states initialiser / server-side default and send to the client side automatically via use_transitive_state.

For a state to be transitive, it needs to be #[derive(Serialize, Deserialize)].
Mutating states in SSR should not be supported as this should only happen with effects and effects do not run in SSR.