Add create:settings command

[RomainMazB]

Discussed here: wintercms/winter#201

[LukeTowers]

Side note, would it instead be better to have create:settings rather than a flag on create:model?

[RomainMazB]

Side note, would it instead be better to have create:settings rather than a flag on create:model?

You are the one who determine that, just let me know.

My thoughts on that:
Upside: less verbose, stubs directory structure cleaner
Downside: less intuitive for beginners: we create a settings but it's created into the models directory

[LukeTowers]

@RomainMazB I think I prefer create:settings Author.Plugin ?OptionalSettingsClassOverride rather than create:model Author.Plugin SettingsClass --settings. @wintercms/maintainers any thoughts?

[LukeTowers]

@RomainMazB let's go with create:settings instead, and if it's possible (and not already done so) we should have a success message after the files are created that lists the files that were created as a result of the command so that it's very clear where their files were created and what they are.

[RomainMazB]

@RomainMazB let's go with create:settings instead, and if it's possible (and not already done so) we should have a success message after the files are created that lists the files that were created as a result of the command so that it's very clear where their files were created and what they are.

create:settings is now ok.
To list the files created during all the create:, we should improve the GeneratorCommand class which only displays a successful message atm.

I'm on it :)