Add support for Windows and MacOS.

[burntcarrot]

The test coverage action doesn't work on Windows and MacOS.

Since we're planning to run tests on Windows and MacOS for the DeepSource CLI, I think it would be a helpful feature!

Using the action under Windows/MacOS runner OS environments throws an error like this:

deepsourcelabs/test-coverage-action@master action is only supported on Linux

[siddhant-deepsource]

Creating a composite action seems to be an option. 🤔

Another promising way is to modify the action into a JavaScript action since they are supported on all platforms.