Problem

When customers exceed the terms of their license, we want them to know it. This includes users who only use the CLI.

RFC

Acceptance Criteria

1. Obtain a license file with a low user limit (10 or so)
2. Add license to test cluster
   coder license add <license file>
3. Create more users than allowed
4. Validate that CLI commands that interact with the API print a warning to stderr with warnings about having too many users. E.g.
   coder users list
coder templates list