Some UI to create components and contracts

[labordep]

The suggestion is to have UI to create Components and Contracts (with Traits) using Pharo source code creation UI.
For example to have the same way to create a new Class or a new Trait but with a Component :

• Right clic on a package in a browser to open the contextual manu, have the Molecule submenu item and New Component, New Component Type, etc.
• Possibility to add Services, Events, Parameters, etc. in each Type juste with the contextual menu
• Extend an existing Class has a Component using a Type and directly add the Component behavior trait

etc.