Add "g3w-suite" to Developers Italia catalog

[Raruto]

Checklist

• I've searched through the current issues to make sure this feature hasn't been requested already.

Motivation

Third party open source software, such as those which are not put into reuse by the Public Administration but are potentially interesting for the public sector, can be included in the Developers Italia catalogue.

Suggested solution

1. fill and include a publiccode.yml file in this repository (leaving the codiceIPA key empty);
2. open a new issue on the Catalog’s repository using this page

Fore more info: https://developers.italia.it/it/riuso/pubblicazione

Alternatives considered

No response