[Resolver]: Adding tests to Github workflows

[malhotra5]

Summary I would like to add unit tests for Github workflows for openhands-resolver.

Motivation The workflow definitions are the entry points for openhands-resolver, making it the largest potential single point of failure. Currently making changes to the workflows needs to be manually tested in a separate repo. We've added many ways to trigger the workflows, so testing all of them manually tends to be tedious and often error prone. A way to do tests (at least a fraction of them) locally would be helpful.

Technical Design ts-run-api could be a good package to look into to facilitate this.

Alternatives to Consider

Additional context