Add flag to cli to specify config file.

[ericwooley]

Desired Behavior

Currently the cli just looks through CWD for the config file with the specific extensions. However, this can be a little annoying since I need to define it in my source directory as well to load it to run things. Currently I'm just duplicating the file, which isn't a huge deal, but not ideal either.

Example Usage

openworkflow --config src/openworkflow.config.ts worker start

would be much appreciated.

[jamescmartinez]

Good call. I'd love to get this in. Any chance you're up for submitting a PR for it?