fixup! util/vizerror: add new package for visible errors

Signed-off-by: Will Norris <will@tailscale.com>

util/vizerror/vizerror.go

@@ -11,14 +11,31 @@ import (
 )
 
 // Error is an error that is safe to display to end users.
-type Error error
-
-// New returns an error that formats as the given text.
-func New(text string) error {
-	return Error(errors.New(text))
+type Error struct {
+	err error
 }
 
-// Errorf returns an error with the specified format and values.
-func Errorf(format string, a ...any) error {
-	return Error(fmt.Errorf(format, a...))
+// Error implements the error interface.
+func (e Error) Error() string {
+	return e.err.Error()
+}
+
+// New returns an Error that formats as the given text.
+func New(text string) Error {
+	return Error{errors.New(text)}
+}
+
+// Errorf returns an Error with the specified format and values.
+func Errorf(format string, a ...any) Error {
+	return Error{fmt.Errorf(format, a...)}
+}
+
+// Unwrap returns the underlying error.
+func (e Error) Unwrap() error {
+	return e.err
+}
+
+// Wrap err with a vizerror.Error.
+func Wrap(err error) Error {
+	return Error{err}
 }