Refactor unlockers command structure and add quiet flag to list command

- Rename 'unlockers' command to 'unlocker' for consistency
- Move all unlocker subcommands (list, add, remove) under single 'unlocker' command
- Add --quiet/-q flag to 'secret list' for scripting support
- Update documentation and tests to reflect command changes

The quiet flag outputs only secret names without headers or formatting,
making it ideal for shell script usage like: secret get $(secret list -q | head -1)

internal/cli/secrets.go

@@ -65,6 +65,7 @@ func newListCmd() *cobra.Command {
 		Args:    cobra.MaximumNArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) error {
 			jsonOutput, _ := cmd.Flags().GetBool("json")
+			quietOutput, _ := cmd.Flags().GetBool("quiet")
 
 			var filter string
 			if len(args) > 0 {
@@ -73,11 +74,12 @@ func newListCmd() *cobra.Command {
 
 			cli := NewCLIInstance()
 
-			return cli.ListSecrets(cmd, jsonOutput, filter)
+			return cli.ListSecrets(cmd, jsonOutput, quietOutput, filter)
 		},
 	}
 
 	cmd.Flags().Bool("json", false, "Output in JSON format")
+	cmd.Flags().BoolP("quiet", "q", false, "Output only secret names (for scripting)")
 
 	return cmd
 }
@@ -284,7 +286,7 @@ func (cli *Instance) GetSecretWithVersion(cmd *cobra.Command, secretName string,
 }
 
 // ListSecrets lists all secrets in the current vault
-func (cli *Instance) ListSecrets(cmd *cobra.Command, jsonOutput bool, filter string) error {
+func (cli *Instance) ListSecrets(cmd *cobra.Command, jsonOutput bool, quietOutput bool, filter string) error {
 	// Get current vault
 	vlt, err := vault.GetCurrentVault(cli.fs, cli.stateDir)
 	if err != nil {
@@ -341,6 +343,11 @@ func (cli *Instance) ListSecrets(cmd *cobra.Command, jsonOutput bool, filter str
 		}
 
 		cmd.Println(string(jsonBytes))
+	} else if quietOutput {
+		// Quiet output - just secret names
+		for _, secretName := range filteredSecrets {
+			cmd.Println(secretName)
+		}
 	} else {
 		// Pretty table output
 		if len(filteredSecrets) == 0 {