GameSettings: Add per-game input bindings from profiles

This just affects the **bindings**. You will still have to set the
controller type per game if this is different from the global default.

src/frontend-common/game_settings.h

@@ -61,6 +61,7 @@ struct Entry
   std::optional<MemoryCardType> memory_card_2_type;
   std::string memory_card_1_shared_path;
   std::string memory_card_2_shared_path;
+  std::string input_profile_name;
 
   ALWAYS_INLINE bool HasTrait(Trait trait) const { return traits[static_cast<int>(trait)]; }
   ALWAYS_INLINE void AddTrait(Trait trait) { traits[static_cast<int>(trait)] = true; }