* 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 of acc:u0
- Move all account things to the account service
- More accurate IAccountServiceForApplication
- Add helper to UInt128
* FIx my engrish
* FIx my engrish #2