Support OMB config files

[vuldin]

It would be great to be able to run the following command:

xk6-kafka_v0.17.0_linux_amd64 run ./100-topics-1-partitions-1kb.yaml

Where 100-topics-1-partitions-1kb.yaml is this file. openmessaging/benchmark is a popular tool written in Java, and it would be great to replace it with this tool if possible. Enabling the loading of OMB config files would be the most seamless way to enable OMB users to transition over to this tool.

[mostafa]

Hey @vuldin,

I just heard about this tool. Having look at it, it seems it is not a programmable tool, unlike k6 and xk6-kafka, which is fully programmable. I think it would be helpful to add this feature for the transition, but I am not planning to do that. However, I'd be very happy to see contributions.