fixes #59: Github actions added and some issue fixed

[padam-ghimire]

fixes #59

[sumanashrestha]

where do we see the results after upload, do we need to add any thing to readme.md ?

[padam-ghimire]

After uploading coverage results to Codecov using the `codecov/codecov-action@v1` action in your GitHub Actions workflow, you typically don't need to manually add anything to your `README.md`. Codecov automatically integrates with GitHub repositories and provides a badge that you can optionally add to your README to display the coverage status. The coverage results can be viewed on the Codecov website. When you navigate to your repository's page on Codecov, you'll see detailed coverage reports including coverage percentages for each file, as well as overall coverage for your project. Additionally, Codecov provides features like viewing coverage changes over time, comparing branches, and more.

[sapradhan]

@padam-ghimire upload to codecov is failing, can you see why