lib: support `FORCE_COLOR` for non TTY streams

The current behavior of FORCE_COLOR is to take effect when stdout/stderr are TTY's

according to the documentation:

The FORCE_COLOR environment variable is used to enable ANSI colorized output.

this PR moves the check for the value of FORCE_COLOR before testing isTTY - and extracts the logic to a central utility.

Refs: https://github.com/nodejs/node/issues/31409#issuecomment-575938492