Some improvements, added cutscene stub

src/dialogue/DialogueSystem.h

@@ -3,6 +3,7 @@
 #include "dialogue/DialogueOverlay.h"
 #include "dialogue/DialogueRuntime.h"
 #include <SDL.h>
+#include <functional>
 #include <string>
 
 namespace ZL::Dialogue {
@@ -21,6 +22,8 @@ public:
 	bool handlePointerReleased(float x, float y);
 
 	bool startDialogue(const std::string& dialogueId);
+	bool startCutscene(const std::string& cutsceneId);
+	void setOnCutsceneFinished(std::function<void(const std::string&)> cb);
 	void stopDialogue();
 
 	bool isActive() const { return runtime.isActive(); }