environment variables and CI mode

[BioPhoton]

To detect if the CLI runs in CI or locally (or in the sandbox tests) we need to have a way to detect this.

In general the name CI is used and set to true or 1.

The folowing platforms have a CI key:

• CI=true - github

• CI=true - circleci

• CI=true - gitlab

• CI=true - travis

• CI=true - netlify

• CI=1 - vercel

Unknown:

• ??? - Jenkins
• ??? - Azure Pipelines