R0.2 - Basic Cost Viewing

[galenatjpl]

TODO: Galen to fill in more details.
This will most likely be a set of documentation, not actual implementation.

Acceptance Criteria

Guide for tenants to understand their common-services usage and cost
Guide for tenants to understand their project specific usage and cost

[galenatjpl]

I started documenting here:
https://github.com/unity-sds/unity-cs/wiki/Viewing-MCP-Cloud-Costs

Linked from here:
https://github.com/unity-sds/unity-cs/wiki