fix: resolve all nlreturn linter errors

Add blank lines before return statements in all files to satisfy
the nlreturn linter. This improves code readability by providing
visual separation before return statements.

Changes made across 24 files:
- internal/cli/*.go
- internal/secret/*.go
- internal/vault/*.go
- pkg/agehd/agehd.go
- pkg/bip85/bip85.go

All 143 nlreturn issues have been resolved.

internal/secret/crypto.go

@@ -20,6 +20,7 @@ func EncryptToRecipient(data []byte, recipient age.Recipient) ([]byte, error) {
 	w, err := age.Encrypt(&buf, recipient)
 	if err != nil {
 		Debug("Failed to create encryptor", "error", err)
+
 		return nil, fmt.Errorf("failed to create encryptor: %w", err)
 	}
 	Debug("Created age encryptor successfully")
@@ -27,6 +28,7 @@ func EncryptToRecipient(data []byte, recipient age.Recipient) ([]byte, error) {
 	Debug("Writing data to encryptor")
 	if _, err := w.Write(data); err != nil {
 		Debug("Failed to write data to encryptor", "error", err)
+
 		return nil, fmt.Errorf("failed to write data: %w", err)
 	}
 	Debug("Wrote data to encryptor successfully")
@@ -34,6 +36,7 @@ func EncryptToRecipient(data []byte, recipient age.Recipient) ([]byte, error) {
 	Debug("Closing encryptor")
 	if err := w.Close(); err != nil {
 		Debug("Failed to close encryptor", "error", err)
+
 		return nil, fmt.Errorf("failed to close encryptor: %w", err)
 	}
 	Debug("Closed encryptor successfully")