macOS (Apple silicon and Intel): Fry3DX.app with its content in Resources and MoltenVK in Frameworks, OpenGL 4.1 when there's no Vulkan; the program's own path, memory, OS and CPU names on a Mac; files dropped on the window (and opened from the Finder) open; presets macos-arm64/macos-x64, a CI job, tools/package.py macos makes one universal app

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

engine/engine.h

@@ -33,6 +33,9 @@ public:
     // The window's close button (or the OS asking it to close): false keeps it open (to ask
     // about saving first; the game quits later itself). The quit command always quits.
     virtual bool allowQuit() { return true; }
+    // A file dropped on the window, or opened with the program from the desktop (a Mac's Finder
+    // hands it over this way, not on the command line).
+    virtual void onFileDropped(const std::string& path) { (void)path; }
     // Hot reload: called twice a second (hotreload 1) after the engine reloaded what changed
     // (`changed`: textures, models, sounds); the game reloads its own (scripts, the map).
     virtual void hotReload(const std::vector<std::string>& changed) { (void)changed; }