Fix .deb packaging: add SHLIBDEPS_PRIVATE_DIRS for FetchContent SDL3 and enable packaging on workflow_dispatch

Co-authored-by: univrsal <8353672+univrsal@users.noreply.github.com>

Author: Copilot

.github/workflows/build-project.yaml

@@ -50,7 +50,7 @@ jobs:
               fi
               ;;
             workflow_dispatch)
-              config_data=('codesign:true' 'notarize:false' 'package:false' 'config:RelWithDebInfo')
+              config_data=('codesign:true' 'notarize:false' 'package:true' 'config:RelWithDebInfo')
               ;;
             schedule)
               config_data=('codesign:true' 'notarize:false' 'package:true' 'config:RelWithDebInfo')

cmake/linux/defaults.cmake

@@ -18,6 +18,7 @@ set(CPACK_PACKAGE_FILE_NAME "${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSION}-${CM
 
 set(CPACK_GENERATOR "DEB")
 set(CPACK_DEBIAN_PACKAGE_SHLIBDEPS ON)
+set(CPACK_DEBIAN_PACKAGE_SHLIBDEPS_PRIVATE_DIRS "${CMAKE_BINARY_DIR}/_deps/sdl3-build")
 set(CPACK_DEBIAN_PACKAGE_MAINTAINER "${PLUGIN_EMAIL}")
 set(CPACK_SET_DESTDIR ON)