Make CommandRegistration.Builder matching with new SecurityFilterChain builder format

[heavynimbus]

Hi,
I think CommandRegistration.Builder can be upgraded by following new SecurityFilterChain's builder usage from Spring Security

@Bean
public CommandRegistration myCommand() {
  return CommandRegistration.builder()
    .command("my-command")
    .withOption()
    .longName("option1")
    .required()
    .type(String.class)
    .and()
    .withOption()
    .longName("option1")
    .required()
    .type(String.class)
    .and()
    .withTarget()
    .consumer(ctx -> ctx.getTerminal().writer().println("Hello World"))
    .and()
    .build();
}

Could became:

@Bean
public CommandRegistration myCommand() {
  return CommandRegistration.builder()
    .command("my-command")
    .withOption(optionCustomizer -> 
      optionCustomizer.longName("option1")
        .required()
        .type(String.class)
    )
    .withOption(optionCustomizer -> 
      optionCustomizer.longName("option2")
        .required()
        .type(String.class)
    )
    .withTarget(targetCustomizer ->
      targetCustomizer.consumer(ctx -> ctx.getTerminal().writer().println("Hello World"))
    )
    .build();
}

This could be done for withOption, withTarget, withAlias, withErrorHandling, withHelpOption and withExitCode

I think this makes for more readable code and allows for better indentation for automated formatters

Thank's for reading :)

[jvalkeal]

Without looking into details this sounds like a good idea.

While you don't need to chain "dsl type javaconfig" together order to get better programmatic access I've always disliked that approach as config then starts to look a bit cluttered. Taking idea from a Spring Security for lambda style makes that part more clean.