Add UI to configure keyboard-to-controller mapping (#308)

* Add UI to configure keyboard-to-controller mapping

* Add an optional "---fix" argument to format-checking script

* clang fix

---------

Co-authored-by: georgemoralis <giorgosmrls@gmail.com>

src/emulator.h

@@ -34,6 +34,6 @@ private:
     Input::GameController* controller;
     Core::Linker* linker;
     std::unique_ptr<Frontend::WindowSDL> window;
+    std::map<u32, KeysMapping> m_keysBindingsMap;
 };
-
 } // namespace Core