Add CI script using Github Actions for each PR

[RishabhJain2018]

Issue:

Currently, there is no way to test the changes in the EvalAI-Starters Repository after merging each PR. It is a manual process for now.

Fix:

Create a CI pipeline using Github Actions, which runs whenever a PR is opened or merged to master branch, to validate the changes in the challenge_config.yml

[Eeshu-Yadav]

Hi @RishabhJain2018,
I’ll start working on the implementation and raise a PR soon with the GitHub Actions workflow for CI validation.

I’ll keep you updated once the PR is ready for review.