[Story] Aggregated dashboard and projections for group of companies

[eirirlar]

👤 As a user
🙏 I want to be able to define a group of companies and give the group a name
🎯 so that I can view the dashboard and projections pages for the group.

Acceptance Criteria 👍 / 👎

The dashboard and projections contains the results of an aggregation of the transactions for all the companies in the group.