feat: Add support for creating autolink references

pkg/cmd/repo/autolink/domain/autolink.go

@@ -0,0 +1,14 @@
+package domain
+
+import "github.com/cli/cli/v2/pkg/cmdutil"
+
+type Autolink struct {
+	ID             int    `json:"id"`
+	IsAlphanumeric bool   `json:"is_alphanumeric"`
+	KeyPrefix      string `json:"key_prefix"`
+	URLTemplate    string `json:"url_template"`
+}
+
+func (a *Autolink) ExportData(fields []string) map[string]interface{} {
+	return cmdutil.StructExportData(a, fields)
+}