Validate environment variables using Zod

[tyler-dane]

Feature Description

As a contributor, I want to see any issues with my env file in the console during startup, so that I can quickly understand and fix it. If there are any critical errors during runtime, I want to see the error. If there are any optional features that I opted out of, I want to see a warning in the console but still be able to use the app.

Additional Context

We're currently doing this validation by-hand in env.constants by checking the types of the values in env.process. Using a dedicated validation library like zod will let us do this in a more straightforward way. It'll also make our error messages more clear

Acceptance Criteria

• update compass docs with new env info