feat: add . as a valid option to create or allow no argument

[a-wallen]

Description
As a user of the very_good_cli I want to be able to use . as the argument for very_good create.

If no argument or . is given, the cli uses the current folder's name as the project name.

[tomarra]

Notes

• The flutter create command works the same way, allowing . to automatically pull in the current directory name
• This should not override the current default which is to error out to the help output. If a user wants to use this option they should be explicitly adding . to the command.
• We do have support for this in the dart_frog_cli already as well

[tomarra]

Hi @a-wallen 👋 given the notes we have added here would you be willing to help out and submit a PR for this change?

[a-wallen]

yeah I'm down