Add sample code in documentation for methods that support Combine in - [ ] [MTAccountService.swift](https://github.com/devwaseem/MailTMSwift/blob/c8188eef0dd886d649a5df3f778c562d5577d98f/Sources/MailTMSwift/Services/MTAccountService.swift) - [ ] [MTDomainService.swift](https://github.com/devwaseem/MailTMSwift/blob/c8188eef0dd886d649a5df3f778c562d5577d98f/Sources/MailTMSwift/Services/MTDomainService.swift) - [ ] [MTMessagesService.swift](https://github.com/devwaseem/MailTMSwift/blob/c8188eef0dd886d649a5df3f778c562d5577d98f/Sources/MailTMSwift/Services/MTMessagesService.swift) - [ ] [README.md](https://github.com/devwaseem/MailTMSwift/blob/c8188eef0dd886d649a5df3f778c562d5577d98f/README.md)
Add sample code in documentation for methods that support Combine in