[TRI-1296] feat: CLI dev should work with injected environment variables

[matt-aitken]

Is your feature request related to a problem? Please describe.

The CLI dev command fails if you don't use .env files – instead using something like 1Password to inject the values.

Describe the solution you'd like to see

Make the @trigger.dev/cli first check if the TRIGGER_API_KEY is defined in the current process.

Additional information

This is the relevant code: https://github.com/triggerdotdev/trigger.dev/blob/main/packages/cli/src/utils/getTriggerApiDetails.ts#L36

_{From SyncLinear.com | TRI-1296}

[Chigala]

Hey @matt-aitken please assign this to me

[matt-aitken]

@Chigala thanks! We're announcing our Hacktoberfest competition in a couple of days. This issue is now tagged with it