Add "get-zone" command (#613)

* Add GetZoneRecords to DNSProvider interface
* dnscontrol now uses ufave/cli/v2
* NEW: get-zones.md
* HasRecordTypeName should be a method on models.Records not models.DomainConfig
* Implement BIND's GetZoneRecords
* new WriteZoneFile implemented
* go mod vendor
* Update docs to use get-zone instead of convertzone
* Add CanGetZone capability and update all providers.
* Get all zones for a provider at once (#626)
* implement GetZoneRecords for cloudflare
* munge cloudflare ttls
* Implement GetZoneRecords for cloudflare (#625)

Co-authored-by: Craig Peterson <192540+captncraig@users.noreply.github.com>

providers/capabilities.go

@@ -49,6 +49,9 @@ const (
 
 	// CanUseRoute53Alias indicates the provider support the specific R53_ALIAS records that only the Route53 provider supports
 	CanUseRoute53Alias
+
+	// CanGetZoe indicates the provider supports the get-zones subcommand.
+	CanGetZones
 )
 
 var providerCapabilities = map[string]map[Capability]bool{}