feat: default keychain helper

pkg/keychain/helper_linux.go

@@ -40,6 +40,14 @@ func init() { // nolint[noinit]
 	if _, err := exec.LookPath("gnome-keyring"); err == nil {
 		Helpers[GnomeKeyring] = newGnomeKeyringHelper
 	}
+
+	// If GnomeKeyring is available, use it by default.
+	// Otherwise, if pass is available, use it by default.
+	if _, ok := Helpers[GnomeKeyring]; ok {
+		defaultHelper = GnomeKeyring
+	} else if _, ok := Helpers[Pass]; ok {
+		defaultHelper = Pass
+	}
 }
 
 func newPassHelper(string) (credentials.Helper, error) {