Rework the GUI so it uses SFMLBackend by moving the SoundQuip into SFMLBackend.

sfmlbackend.cpp

@@ -9,11 +9,33 @@
 #include <SFML/Graphics/Text.hpp>
 #include <SFML/Audio.hpp>
 #include <SFML/Window/Event.hpp>
+#include <nlohmann/json.hpp>
 #include "sfmlbackend.hpp"
 
+using namespace fmt;
+using namespace nlohmann;
 using namespace ImGui;
 using std::string;
 
+void SoundQuip::load(json &data, const char *file_key) {
+  auto audio = data["audio"];
+  json::string_t file_name = audio[file_key].template get<string>();
+
+  if(!buffer.loadFromFile(file_name)) {
+    println("Failed to load sound: {} with file {}", file_key, file_name);
+  }
+
+  sound.setBuffer(buffer);
+}
+
+void SoundQuip::play() {
+  sound.play();
+}
+
+void SoundQuip::stop() {
+  sound.stop();
+}
+
 void SFMLBackend::ImGui_setup() {
   bool res = SFML::Init(window);
   fmt::println("IMGUI returned {}", res);