Add license select to the new module

[vasilii-b]

Description (*)

This PR makes it possible to specify the module's license(s) at the "New Magento 2 Module" dialog.

It is possible to

1. Select multiple licenses
2. Add custom license name
3. Mix provided licenses with custom one

The "Custom License Name" input is available only when the "Custom License" is selected.

Fixed Issues (if relevant)

1. Action/Code Generation. Add license select to the new module #55: Action/Code Generation. Add license select to the new module

Questions or comments

I wonder whenever the changes/approach added in file idea/magento2plugin/actions/generation/generator/ModuleComposerJsonGenerator.java is fine or not.

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages

[MellenIO]

Although I'm not part of the team here, I read your PR and believe some things could be improved about it - would I be alright to leave some notes later today? :)

[vasilii-b]

Hi @MellenIO,
I believe yes, you can write your suggestions.
You can also open a new issue with your suggestions anytime.
Cheers!

[VitaliyBoyko]

Hi, @MellenIO,
This is an opensource project, anyone can be part of the team. You as well ;)