feat(cli): add advanced command hint to help output

internal/app/azldev/app.go

@@ -155,6 +155,7 @@ lives), or use -C to point to one.`,
 
 	app.cmd.SetHelpCommandGroupID(CommandGroupMeta)
 	app.cmd.SetCompletionCommandGroupID(CommandGroupMeta)
+	app.addAdvancedCommandHint()
 
 	// Define global flags and configuration settings.
 	app.cmd.PersistentFlags().BoolVarP(&app.verbose, "verbose", "v", false, "enable verbose output")
@@ -179,6 +180,18 @@ lives), or use -C to point to one.`,
 	return app
 }
 
+// addAdvancedCommandHint embeds a hint about the hidden "advanced" command group
+// into the root command's usage template so that DisableExtraNewlines handles
+// trailing whitespace consistently.
+func (a *App) addAdvancedCommandHint() {
+	tmpl := a.cmd.UsageTemplate()
+	tmpl = strings.TrimSuffix(tmpl, "\n")
+	tmpl += `{{if not .HasParent}}
+Use "{{.CommandPath}} advanced --help" for additional tools (mock, mcp, wget).{{end}}
+`
+	a.cmd.SetUsageTemplate(tmpl)
+}
+
 // Returns the names of the app's commands. The optional provided list of ancestors
 // instructs this function to traverse through the command hierarchy before retrieving
 // child names. This function is largely intended for tests to introspect on the

scenario/__snapshots__/TestSnapshotsContainer_--bogus-flag_stderr_1.snap

@@ -31,6 +31,7 @@ Flags:
       --version                   version for azldev
 
 Use "azldev [command] --help" for more information about a command.
+Use "azldev advanced --help" for additional tools (mock, mcp, wget).
 
 
 ##:##:## ERR Error: unknown flag: --bogus-flag

scenario/__snapshots__/TestSnapshotsContainer_--help_stdout_1.snap

@@ -38,4 +38,5 @@ Flags:
       --version                   version for azldev
 
 Use "azldev [command] --help" for more information about a command.
+Use "azldev advanced --help" for additional tools (mock, mcp, wget).
 

scenario/__snapshots__/TestSnapshotsContainer_help_stdout_1.snap

@@ -38,4 +38,5 @@ Flags:
       --version                   version for azldev
 
 Use "azldev [command] --help" for more information about a command.
+Use "azldev advanced --help" for additional tools (mock, mcp, wget).
 

scenario/__snapshots__/TestSnapshots_--bogus-flag_stderr_1.snap

@@ -31,6 +31,7 @@ Flags:
       --version                   version for azldev
 
 Use "azldev [command] --help" for more information about a command.
+Use "azldev advanced --help" for additional tools (mock, mcp, wget).
 
 
 ##:##:## ERR Error: unknown flag: --bogus-flag

scenario/__snapshots__/TestSnapshots_--help_stdout_1.snap

@@ -38,4 +38,5 @@ Flags:
       --version                   version for azldev
 
 Use "azldev [command] --help" for more information about a command.
+Use "azldev advanced --help" for additional tools (mock, mcp, wget).
 

scenario/__snapshots__/TestSnapshots_--help_with_color_stdout_1.snap

@@ -38,4 +38,5 @@ Meta commands:
       --version                   version for azldev
 
 Use "azldev [command] --help" for more information about a command.
+Use "azldev advanced --help" for additional tools (mock, mcp, wget).
 

scenario/__snapshots__/TestSnapshots_help_stdout_1.snap

@@ -38,4 +38,5 @@ Flags:
       --version                   version for azldev
 
 Use "azldev [command] --help" for more information about a command.
+Use "azldev advanced --help" for additional tools (mock, mcp, wget).