Adding Heroku Deployment workflow

[AidenMontgomery]

This workflow should be able to deploy the bot to Heroku when new changes are committed to the main branch. We still need to get the secrets setup, before we can test it.

If someone can create the following secrets, I can then supply the values to go into them.

secrets.HEROKU_API_KEY
secrets.HEROKU_APP_NAME
secrets.HEROKU_EMAIL

I would also like to know if we can run the other workflow for testing and linting as part of this one, or before this one runs.

[AidenMontgomery]

As we are going to merge this code base into Devie, this PR should not be merged here, but I will leave it open for now for reference.