Bring Heroku Add-On Portal into Salesforce Service Cloud

### Required Terms

- [X] I agree to follow this project's [Code of Conduct](https://github.com/heroku/roadmap/blob/main/CODE_OF_CONDUCT.md)
- [X] I have read and accept the [Salesforce Program Agreement](https://www.salesforce.com/company/program-agreement/)

### What service(s) is this request for?

_No response_

### Tell us about what you're trying to solve. What challenges are you facing?

When providing support as a Heroku Add-On provider, engineers must log in to the Heroku Portal to provide customers support. Engineers already using Service Cloud are then pulled into another system with a different look and feel, different queue, etc.

Allow for the customer issues in the Heroku Portal to be viewed and actioned on right in Service Cloud so engineers can stay in 1 system and more easily provide customers with answers.