Add GraphicsEditor class

Super donkey proto graphics import experiment

removed snes_spc and asar_static because of macOS M1 build issues.

music player using snes_spc disabled

included macOS build configuration as it currently is.

src/app/rom.h

@@ -139,7 +139,7 @@ class ROM {
   void LoadAllPalettes();
 
   // Save functions
-  absl::Status SaveToFile(bool backup);
+  absl::Status SaveToFile(bool backup, absl::string_view filename = "");
   void UpdatePaletteColor(const std::string& groupName, size_t paletteIndex,
                           size_t colorIndex, const gfx::SNESColor& newColor);
   void SaveAllPalettes();