[CR] RES-957: Add new documentation pages for Reseller Haiku API

# Summary
 As a developer I need reseller framework documentation to be on SG official documentation in order to be used by our resellers.
 
## PR - Merge Checklist:
- [ ] CR’d 
- [x] README updated or N/A
- [x] Repo/unit tests pass
- [x] Dependencies satisfied 
- [ ] Acceptance criteria verified by QE
- [ ] End to end testing completed by QE
 
## Dependencies:

Customers email to Customer email