Develop command working

[cronan03]

Add the develop command and scaffolding of the new command line tool.

[fcollonval]

Thanks @cronan03

First comment, about git usage, I recommend you to use a specific branch in your fork to push changes; see that explanation using forking workflow with feature branch.

The dummy test extension is pushed as part of the changes. That is unwanted. To remove the files from this PR but not from your local copy, you can execute the following command:

git rm --cached -r tests/dummy

[fcollonval]

Here are a list of simplification you should be able to do.

We will not extract the commands enable/disable, lock/unlock, list, link/unlink, check, install/uninstall and update commands. So we will focus on develop, build and watch. And we will import also a utilities command line (I'll explain that on our call).

[fcollonval]

You should be able to remove this file

[fcollonval]

Please remove this file

[fcollonval]

Thanks @cronan03

Let's merge this to move forward.