Allow Environment variables as command line params to inso cli

Is your feature request related to a problem? Please describe.
Environment Variable can hold some sensitive information such as client secret. We cannot check-in such secrets in repo which blocks us from running inso.

Describe the solution you'd like
Allow passing environment variables via command-line argument similar to how newman(postman cli) provides: -

--env-var "<environment-variable-name>=<environment-variable-value>"
Allows the specification of environment variables via the command line, in a key=value format. Multiple CLI environment variables can be added by using --env-var multiple times, like so: --env-var "foo=bar" --env-var "alpha=beta".


Describe alternatives you've considered
Finding and replacing environment variables in CI