refactor(app): reorganize application structure and update includes

- Moved core components such as `Controller` and `Window` from `src/app/core/` to `src/app/` and `src/app/platform/`, respectively, to improve modularity and clarity.
- Updated include paths across the codebase to reflect the new locations of these components.
- Introduced a new foundational core library in `src/core/` for project management and ROM patching logic, enhancing the separation of concerns.
- Adjusted CMake configurations to ensure proper compilation of the new core library and updated dependencies in various modules.

Benefits:
- Streamlines the application structure, making it easier to navigate and maintain.
- Enhances code organization by clearly delineating core functionalities from application-specific logic.
- Improves overall architecture by promoting a clearer separation of concerns between different components.

src/app/controller.h

@@ -0,0 +1,56 @@
+#ifndef YAZE_APP_CORE_CONTROLLER_H
+#define YAZE_APP_CORE_CONTROLLER_H
+
+#include <SDL.h>
+
+#include <memory>
+
+#include "absl/status/status.h"
+#include "app/platform/window.h"
+#include "app/rom.h"
+#include "app/editor/editor_manager.h"
+#include "app/gfx/backend/irenderer.h"
+
+int main(int argc, char** argv);
+
+namespace yaze {
+
+/**
+ * @brief Main controller for the application.
+ *
+ * This class is responsible for managing the main window and the
+ * main editor. It is the main entry point for the application.
+ */
+class Controller {
+ public:
+  bool IsActive() const { return active_; }
+  absl::Status OnEntry(std::string filename = "");
+  void OnInput();
+  absl::Status OnLoad();
+  void DoRender() const;
+  void OnExit();
+  
+  // Set startup editor and cards from command-line flags
+  void SetStartupEditor(const std::string& editor_name, const std::string& cards);
+
+  auto window() -> SDL_Window* { return window_.window_.get(); }
+  void set_active(bool active) { active_ = active; }
+  auto active() const { return active_; }
+  auto overworld() -> yaze::zelda3::Overworld* {
+    return editor_manager_.overworld();
+  }
+  auto GetCurrentRom() -> Rom* { return editor_manager_.GetCurrentRom(); }
+  auto renderer() -> gfx::IRenderer* { return renderer_.get(); }
+
+ private:
+  friend int ::main(int argc, char** argv);
+
+  bool active_ = false;
+  core::Window window_;
+  editor::EditorManager editor_manager_;
+  std::unique_ptr<gfx::IRenderer> renderer_;
+};
+
+}  // namespace yaze
+
+#endif  // YAZE_APP_CORE_CONTROLLER_H