convert Resolver into a Service.

src/admin/query/resolver.rs

src/service/globals/client.rs

src/service/globals/mod.rs

src/service/mod.rs

src/service/resolver/mod.rs

src/service/sending/mod.rs

src/service/sending/resolve.rs

src/service/sending/send.rs

src/service/service.rs

src/service/services.rs