Create new GCP projects within Eclipse

We currently link to the Developer Console (`console.cloud.google.com`) to create new GCP projects, but the linked to pages are sometimes difficult to interpret (#2023). Perhaps we should offer a way to create new GCP projects from within Eclipse.

Relevant APIs:
- [Creating a project](https://cloud.google.com/resource-manager/docs/creating-managing-projects)
- [Creating an AppEngine app](https://cloud.google.com/appengine/docs/admin-api/reference/rest/v1/apps/create)
- [Retrieve list of App Engine locations/regions](https://developers.google.com/apis-explorer/#search/appengine%20locations%20list/m/appengine/v1beta/appengine.apps.locations.list?appsId=-&_h=2&)