question: support using .env / .Renviron for setting env vars

[JosiahParry]

Supersedes https://github.com/ricochet-rs/ricochet/issues/81#issue-2584161217

When we make an initial deployment to ricochet, we have the ability to set initial environment variables. This is done by using the RSA public key to encrypt the variables. Server side we decrypt them and then re-encrypt using the AES algo to store them at rest.

Do we want to enable publishing with .env and .Renviron variables? Or expose another way to set environment variables via cli?

[pat-s]

Do we want to enable publishing with .env and .Renviron variables? Or expose another way to set environment variables via cli?

We should definitely honor the normal flow and definitions of env vars set in the calling environment.