Related to gargantext/purescript-gargantext#600

This is a first stepping stone in avoiding bugs by having `UserId` and
`ContextId` being proper types, and not synonyms.

We also refactor things to have `AuthenticatedUser` carry the `UserId`.

Basically, Gargantext.Prelude exports all of Protolude now.

It can be used to "bolt-on" policy checking into Servant API routes.

This is safer than type Limit = Int

This big commit improves the jobs API in a way that now we can
completely abstract away over a JobLog.

NOTE: This doesn't compile yet because of HTML types.

Still, email is missing and the handling of user click.