Add Slack notification support to CI

[jbuckner]

Add Slack notifications during Github Action CI builds

[sarthakkundra]

Hey @jbuckner I can take this up too! :)

[jbuckner]

Look into this one. It may require some setup from our end to integrate. I've only previously integrated TravisCI and it required some extra setup work on the Slack side.

[sarthakkundra]

I think the Slack permissions might be required. I'll get back with the exact requirements after some research.

[sarthakkundra]

Hey @jbuckner just wanted to clarify what is required in the Slack notification?

1. Do you want the CI report to be sent on Slack
2. Or just a notification whenever someone pushes code?

I was thinking of using this Github action