neteja tidy a source/game (fixes d'arrel: BulletKind enum class, signatures, branches)

source/main.cpp

@@ -44,17 +44,17 @@ Reescribiendo el código el 27/09/2022
 
 #include "core/system/director.h"
 
-SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[]) {
+auto SDL_AppInit(void **appstate, int argc, char *argv[]) -> SDL_AppResult {
     auto *director = new Director(argc, const_cast<const char **>(argv));
     *appstate = director;
     return SDL_APP_CONTINUE;
 }
 
-SDL_AppResult SDL_AppIterate(void *appstate) {
+auto SDL_AppIterate(void *appstate) -> SDL_AppResult {
     return static_cast<Director *>(appstate)->iterate();
 }
 
-SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event) {
+auto SDL_AppEvent(void *appstate, SDL_Event *event) -> SDL_AppResult {
     return static_cast<Director *>(appstate)->handleEvent(event);
 }