* IGeneralService Implement GetClientId and IsAnyInternetRequestAccepted
- Add nifm:a and nifm:u with a max sessions as comment since sm don't take care of sessions for now.
- Implement IGeneralService GetClientId based on RE (close#623).
- Implement IGeneralService IsAnyInternetRequestAccepted based on RE (close#624).
- Add some informations in IGeneralService CreateRequest.
- Fix a comment in IAccountService.
* Fix requested changes
* refactoring result codes
- Add a main enum who can handle some orphalin result codes and the default `ResultCode.Success` one.
- Add sub-enum by services when it's needed.
- Remove some empty line.
- Recast all service calls to ResultCode.
- Remove some unneeded static declaration.
- Delete unused `NvHelper` class.
* NvResult is back
* Fix