Clang-format sees the text behind `#pragma region` as code and formats it. Instead of stating the copyright and date there, it's now in the comment block right below it. The text "Copyright" is left in the `#pragma region` line, as clang-format sees it as a single identifier.
I took the opportunity to normalize the dates, and add the copyright notice to the source files where it was missing them (except for third-party and the generated resources.h file).
- Use `= 0` for initializing types
- Add default values to some structs, instead of zero-initializing their instances with `{}`
- Use `std::make_unique` in Network.cpp
- Remove trivial constructors and destructors
- Improve readability of expression in Vehicle.cpp
