Teach runs list endpoints to use parameters

[shalecraig]

Change

Teach the client.runs.list endpoint about a parameters: kwarg. That kwarg is passed to the underlying GET request.

Motivation

I would like to check the latest run for a thread, and it seems like the best way to do this is to list the runs for a thread limited to 1.

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[alexrudall]

Thanks for this, could you add this to the Messages#list endpoint also?

[coezbek]

@alexrudall If you pull @shalecraig PR, I can send you another PR with the messages also updated.

I send @shalecraig the PR already, but am not sure if he sees it: https://github.com/coezbek/ruby-openai/tree/patch-1

[coezbek]

This is also relevant for RunSteps#list endpoint, even though I doubt there should be more than 20 items in this end-point.

[alexrudall]

Thanks @shalecraig & @coezbek!