Enhance CMake configuration for macOS and emulator build

- Added checks to conditionally set the DMG background image and DS Store setup script only if the files exist, improving robustness in packaging.
- Updated the emulator build configuration to skip unnecessary steps in minimal builds, ensuring cleaner builds and better resource management.
- Streamlined target include directories and linking for the emulator, maintaining modularity and clarity in the CMake setup.

cmake/packaging.cmake

@@ -64,8 +64,12 @@ elseif(APPLE)
     set(CPACK_PACKAGE_FILE_NAME "yaze-${CPACK_PACKAGE_VERSION}-macos")
     
     # macOS app bundle configuration
+    if(EXISTS "${CMAKE_SOURCE_DIR}/assets/dmg_background.png")
         set(CPACK_DMG_BACKGROUND_IMAGE "${CMAKE_SOURCE_DIR}/assets/dmg_background.png")
+    endif()
+    if(EXISTS "${CMAKE_SOURCE_DIR}/cmake/dmg_setup.scpt")
         set(CPACK_DMG_DS_STORE_SETUP_SCRIPT "${CMAKE_SOURCE_DIR}/cmake/dmg_setup.scpt")
+    endif()
     
 elseif(UNIX)
     # Linux DEB/RPM configuration

src/app/emu/emu.cmake

@@ -1,5 +1,5 @@
-# Yaze Emulator Standalone Application
-if (APPLE)
+# Yaze Emulator Standalone Application (skip in minimal builds)
+if (NOT YAZE_MINIMAL_BUILD AND APPLE)
   add_executable(
     yaze_emu
     MACOSX_BUNDLE
@@ -16,7 +16,7 @@ if (APPLE)
     ${IMGUI_SRC}
   )
   target_link_libraries(yaze_emu PUBLIC ${COCOA_LIBRARY})
-else()
+elseif(NOT YAZE_MINIMAL_BUILD)
   add_executable(
     yaze_emu
     app/rom.cc
@@ -32,6 +32,8 @@ else()
   )
 endif()
 
+# Only configure emulator target if it was created
+if(NOT YAZE_MINIMAL_BUILD)
   target_include_directories(
     yaze_emu PUBLIC
     ${CMAKE_SOURCE_DIR}/src/lib/
@@ -63,3 +65,4 @@ if(YAZE_ENABLE_UI_TESTS)
   else()
     target_compile_definitions(yaze_emu PRIVATE YAZE_ENABLE_IMGUI_TEST_ENGINE=0)
   endif()
+endif()