fix(cli): Fix the bug where the command description is not displayed.

[k-nasa]

WHY

fix: #19554

Fixed the issue where subcommands are not displayed.

WHAT

• Move about and long_about out of the defer block.
• Confirmed that subcommand descriptions are displayed as follows.

:) % ./target/debug/deno help
...
...

Commands:
  run          Run a JavaScript or TypeScript program
  bench        Run benchmarks
  bundle       Bundle module and dependencies into single file
  cache        Cache the dependencies
  check        Type-check the dependencies
  compile      UNSTABLE: Compile the script into a self contained executable
  completions  Generate shell completions
  coverage     Print coverage reports
  doc          Show documentation for a module
  eval         Eval script
  fmt          Format source files
  init         Initialize a new project
  info         Show info about cache or info related to source file
  install      Install script as an executable
  uninstall    
  lsp          Start the language server
  lint         Lint source files
  repl         
  task         Run a task defined in the configuration file
  test         Run tests
  types        Print runtime TypeScript declarations
  upgrade      Upgrade deno executable to given version
  vendor       Vendor remote modules into a local directory
  help         Print this message or the help of the given subcommand(s)
...
...

[k-nasa]

The difference might be hard to see, but all I did was move it outside of the block.

[crowlKats]

@k-nasa could we get a simple test?

[k-nasa]

Of course, I'll work it tonight.

[crowlKats]

LGTM, thanks!

[k-nasa]

Thanks for review