Add trustee service support to CLI commands

[weppos]

Description

With the upgrade of dnsimple-go to v8.2.0 (#5), the Go client now includes trustee service fields across several structs. The CLI commands need to be updated to surface these new fields in their output and input options.

Reference: dnsimple/dnsimple-go@5e2821c

Expected Behavior or Outcome

• domains get and domains list display the TrusteeService (bool) field from the Domain struct
• tlds get and tlds list display the TrusteeServiceEnabled and TrusteeServiceRequired (bool) fields from the Tld struct
• registrar prices displays the TrusteeServicePrice (*float64) field from the DomainPrice struct (when present)
• registrar register accepts a --trustee-service flag to set the TrusteeService (*bool) field on RegisterDomainInput
• registrar register output displays the TrusteeService (bool) field from the DomainRegistration struct

Resources/References

• dnsimple/dnsimple-go@5e2821c
• Bump github.com/dnsimple/dnsimple-go/v8 from 8.1.0 to 8.2.0 #5