Show default subcommand for --help when using #[default]

[gd0st]

Please complete the following tasks

• I have searched the discussions
• I have searched the open and rejected issues

Clap Version

4.4.8

Describe your use case

It would be nice to for the long --help string to show if a sub-command has been marked as the default when the sub-command is non optional.

Describe the solution you'd like

The current behavior is to just list all of the sub-commands as such

#[derive(clap::Subcommand, Debug, Clone, Default)]
pub enum Subcommand {
    Show,
    Import,
    Config,
    #[default]
    Browse,
    Run {
        path: PathBuf,
    },
}

Usage: kadeu [OPTIONS] <CONFIG> <COMMAND>

Commands:
  show     
  import   
  config   
  browse
  run      
  help     Print this message or the help of the given subcommand(s)

What would be nice is for the help message to feature this instead

Usage: kadeu [OPTIONS] <CONFIG> <COMMAND>

Commands:
  show     
  import   
  config   
  browse (default)
  run      
  help     Print this message or the help of the given subcommand(s)

I don't know how feasible this can be, but I believe this could be a nice addition

Alternatives, if applicable

No response

Additional Context

No response

[epage]

The strange there here is clap has no concept of a #[default] subcommand.

The closest to that is the git stash pattern which we demonstrate in our git cookbook entry where the default is flattened into the parent command