refactor: Provide main entrypoint

As we should have such.

Signed-off-by: Alexander Kurbatov <alkurbatov@virtuozzo.com>

src/CMakeLists.txt

@@ -4,7 +4,7 @@ target_sources(Observer
     PRIVATE
         CameraModule.h
         CameraModule.cpp
-        Observer.cpp
+        main.cpp
         Timer.hpp
         Tools.h
         ToolsCommon.cpp

src/Observer.cpp → src/main.cpp

@@ -160,7 +160,6 @@ int main(int argc, char* argv[])
 			std::cout << "Please provide the replay path as command line argument." << std::endl;
 			return 1;
 		}
-		// FIXME(alkurbatov): Launch in fullscreen mode!
 		while (coordinator.Update() && !coordinator.AllGamesEnded())
 		{
 		}