[Hubs] Power BI onboarding – Streamline the Power BI onboarding experience

[flanakin]

⚠️ Problem

Initial onboarding for Power BI can be a little confusing for people who are new to it.

🛠️ Solution

Create a walkthrough experience to help newcomers setup Power BI and get it connected to their hub instance.

ℹ️ Additional context

Consider copying what is done in these reports: https://github.com/flanakin/cost-management-powerbi

🙋‍♀️ Ask for the community

We could use your help:

1. Please vote this issue up (👍) to prioritize it.
2. Has this been an issue to you? If so, what would you like to see?
3. Leave comments to help us solidify the vision.