fix: add blank lines before return statements (nlreturn)

Fix nlreturn linting issues by adding blank lines before return
statements in cli and secret packages.

internal/cli/cli.go

@@ -27,6 +27,7 @@ type Instance struct {
 func NewCLIInstance() *Instance {
 	fs := afero.NewOsFs()
 	stateDir := secret.DetermineStateDir("")
+
 	return &Instance{
 		fs:       fs,
 		stateDir: stateDir,
@@ -70,6 +71,7 @@ func getStdinScanner() *bufio.Scanner {
 	if stdinScanner == nil {
 		stdinScanner = bufio.NewScanner(os.Stdin)
 	}
+
 	return stdinScanner
 }
 
@@ -87,7 +89,9 @@ func readLineFromStdin(prompt string) (string, error) {
 		if err := scanner.Err(); err != nil {
 			return "", fmt.Errorf("failed to read from stdin: %w", err)
 		}
+
 		return "", fmt.Errorf("failed to read from stdin: EOF")
 	}
+
 	return strings.TrimSpace(scanner.Text()), nil
 }