* Refactoring HOS folder structure
Refactoring HOS folder structure:
- Added some subfolders when needed (Following structure decided in private).
- Added some `Types` folders when needed.
- Little cleanup here and there.
- Add services placeholders for every HOS services (close#766 and #753).
* Remove Types namespaces
* 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
* Clean up ITimeZoneService
Add error codes and simplify parsing
* Add accurate timezone logic
TOOD: LoadTimeZoneRule and location name cmds.
* Integrate the new TimeZone logic
* SCREAMING_UNIX_CASE => PascalCase
* Address comments
* Reduce use of pointer in the LoadTimeZoneRule logic
* Address comments
* Realign tzIfStream logic in LoadTimeZoneRule
* Address gdk's comments
