genial, add support for include-what-you-use reported diagnostics

[ClausKlein]

https://include-what-you-use.org

[1/2] Building CXX object src/sdl/CMakeFiles/test_sdl.dir/main.cpp.o
Warning: include-what-you-use reported diagnostics:

/Users/clausklein/Workspace/cpp/cpp_starter_project/src/sdl/main.cpp should add these lines:
#include <SDL_audio.h>    // for SDL_GetAudioDriver, SDL_GetNumAudioDrivers
#include <SDL_error.h>    // for SDL_GetError
#include <SDL_pixels.h>   // for SDL_MapRGB
#include <SDL_surface.h>  // for SDL_FillRect, SDL_Surface
#include <SDL_timer.h>    // for SDL_Delay
#include <SDL_version.h>  // for SDL_version, SDL_GetVersion
#include <SDL_video.h>    // for SDL_CreateWindow, SDL_DestroyWindow, SDL_Ge...
#include <string.h>       // for strcmp

/Users/clausklein/Workspace/cpp/cpp_starter_project/src/sdl/main.cpp should remove these lines:
- #include <sstream>  // lines 10-10
- #include <stdexcept>  // lines 8-8
- #include <string>  // lines 9-9

The full include-list for /Users/clausklein/Workspace/cpp/cpp_starter_project/src/sdl/main.cpp:
#include <SDL2/SDL.h>     // for SDL_Quit
#include <SDL_audio.h>    // for SDL_GetAudioDriver, SDL_GetNumAudioDrivers
#include <SDL_error.h>    // for SDL_GetError
#include <SDL_pixels.h>   // for SDL_MapRGB
#include <SDL_surface.h>  // for SDL_FillRect, SDL_Surface
#include <SDL_timer.h>    // for SDL_Delay
#include <SDL_version.h>  // for SDL_version, SDL_GetVersion
#include <SDL_video.h>    // for SDL_CreateWindow, SDL_DestroyWindow, SDL_Ge...
#include <stdio.h>        // for fprintf, stderr
#include <string.h>       // for strcmp
#include <cstdlib>        // for NULL
#include <iostream>       // for operator<<, char_traits, basic_ostream, cout
---

[2/2] Linking CXX executable src/sdl/test_sdl
bash-3.2$

[ClausKlein]

see https://github.com/ClausKlein/cpp_starter_project/commit/0225f9fb19c3597d50b840a7d7b6e5a6c2c3b733