First step towards configurable keyboard mappings (#464)

* Configurable keyboard mappings

* Cleanup

* Cleanup

* Biggest mistake of my career

* format

* Fix naming convention

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Co-authored-by: wheremyfoodat <44909372+wheremyfoodat@users.noreply.github.com>

include/panda_sdl/frontend_sdl.hpp

@@ -5,6 +5,7 @@
 #include <filesystem>
 
 #include "emulator.hpp"
+#include "input_mappings.hpp"
 
 class FrontendSDL {
 	Emulator emu;
@@ -16,9 +17,12 @@ class FrontendSDL {
 	FrontendSDL();
 	bool loadROM(const std::filesystem::path& path);
 	void run();
+	u32 getMapping(InputMappings::Scancode scancode) { return keyboardMappings.getMapping(scancode); }
 
 	SDL_Window* window = nullptr;
 	SDL_GameController* gameController = nullptr;
+	InputMappings keyboardMappings;
+
 	int gameControllerID;
 	bool programRunning = true;