Create Building classes for Residential & Storage

Create building classes just like **AProductionBuilding**,
Must be Child of `ABaseBuilding` and implement `IBuildable`.

Following `AProductionBuilding.h` and `AProductionBuilding.cpp`, create and implement:
- [ ] `AResidentialBuilding.h` and `AResidentialBuilding.cpp`
- [ ] `AStorageBuilding.h` and `AStorageBuilding.cpp`

Start by reading AProductionBuilding.h and AProductionBuilding.cpp, then inspect ABaseBuilding and IBuildable to confirm the required inheritance and interface. Create AResidentialBuilding.h/.cpp and AStorageBuilding.h/.cpp following that structure; done means all four files exist and the classes compile with the requested base class and interface.

Written by the indexing model from the issue text.