toolchain: add Xcode command to open a specific project with Xcode
toolchain: add Xcode command to open a specific project with Xcode

rnixx/kivy-ios,kivy/kivy-ios,rnixx/kivy-ios,kivy/kivy-ios,cbenhagen/kivy-ios,tonibagur/kivy-ios,cbenhagen/kivy-ios,tonibagur/kivy-ios,kivy/kivy-ios