[Feature Request] Add List() to retreieve GPG Keys

[straubt1]

GPG key functions exist, but List() is missing.

https://github.com/hashicorp/go-tfe/blob/main/gpg_key.go

Docs: Docs: https://www.terraform.io/cloud-docs/api-docs/private-registry/gpg-keys

Potential interface change:

type GPGKeys interface {
	... existing

	// List all GPG keys.
	List(ctx context.Context, organizationName string) (*GPGKeyList, error)
}

[annawinkler]

Thank you for submitting this issue! It is interesting that the API does not have list. It seems like a reasonable request though! I'll ask 🥳

[straubt1]

I was able to shim this with this url format if that helps.

url := fmt.Sprintf(
  "https://%s/api/registry/private/v2/gpg-keys?filter[namespace]=%s",
  c.Hostname,
  c.OrganizationName,
)

[annawinkler]

Addressed with merged PR.