Build: Fix DiscordRPC not being included in Mac bundle

src/core/CMakeLists.txt

@@ -200,6 +200,13 @@ endfunction()
 function(add_core_resources target)
   add_util_resources(${target})
 
+  if(APPLE)
+    # Copy discord-rpc into the bundle
+    get_target_property(DISCORD_RPC_LIBRARY DiscordRPC::discord-rpc IMPORTED_LOCATION_RELEASE)
+    target_sources(${target} PRIVATE "${DISCORD_RPC_LIBRARY}")
+    set_source_files_properties("${DISCORD_RPC_LIBRARY}" PROPERTIES MACOSX_PACKAGE_LOCATION Frameworks)
+  endif()
+
   file(GLOB_RECURSE RESOURCE_FILES ${CMAKE_SOURCE_DIR}/data/resources/*)
   foreach(path IN LISTS RESOURCE_FILES)
     get_filename_component(file ${path} NAME)