Draft: Add resolve feature

[hrzlgnm]

Todos:

• Add txt to ResolvedService => Show txt of resolved service #26
• Add subdomains to ResolvedService => Show subdomains of a resolved service #27
• Automatically append .local. if not present to services to resolve => Automatically append .local. to service when resolving #28
• Allow resolving of enumerated service => Allow enumerated service to be resolved #25
• Own struct for service type? => Use own type for service with separated fields for name and type #29

struct ServiceType {
   name: String,
   protocol: String, // ._tcp, _udp and so on...
}

Closes #12
Closes #22