[3.2] Document new `dart create` CLI template

[parlough]

Commit reference: dart-lang/sdk@dc6731b

[Priyanshuthapliyal2005]

Can I work on this issue ,and can you explain what I have to done in this issue

[parlough]

Hi @Priyanshuthapliyal2005, thanks for offering to work on this!

This template needs to be added to the table of templates on the dart create page (source).

The description dart create --help provides for this template is:

A command-line application with basic argument parsing.

We could also consider adding more details, such as specifying that it uses package:args. Maybe something like:

A command-line application with basic argument parsing using [`package:args`](https://pub.dev/packages/args).

Let me know if you have any other questions. Note that the PR won't be able to land until the Dart 3.2 stable release that contains the new template, but you can always create it early if you'd like. Thanks again :)