Creates Scopes Editor

[carolahp]

Summary

This PR implements a presenter for creating and editing scopes.
Scopes are used to define parts of the code where refactorings will be applied.

How to test

Open the scope editor from the Pharo menu

While testing consider the following:

• Calypso "Add to scope" commands in contextual menus are still not integrated to the scope editor, and will be replaced by new commands in the Pharo PR mentioned below

Pending features

• Browse a scope on Calypso
• Integrate with Pharo 12, displaying the new scopes in the presenters related to refactorings (I will create a PR on Pharo after this PR is merged)

[carolahp]

hi @carolahp can you please rename the package NewTools-Scopes-Browser to NewTools-Scopes-Editor? the more time you take for doing it, more history we will lose in inceberg :(

hi @estebanlm , it's done, I didn't realize we were losing history

[Ducasse]

I will merge it so that we can try it.

[estebanlm]

why things cannot be tested by just load them, instead merging them into the trunk?

[Ducasse]

My point is not me just but all the people using the scope editor.