DDD Refactor: Move image_build_service to application layer

Make imports available as package.

src/main/python/ddadevops/application/__init__.py

@@ -0,0 +1 @@
+from .image_build_service import ImageBuildService

src/main/python/ddadevops/application/image_build_service.py

@@ -1,5 +1,5 @@
-from .domain import Image
-from .infrastructure import FileApi, ResourceApi, ImageApi
+from src.main.python.ddadevops.domain import Image
+from src.main.python.ddadevops.infrastructure import FileApi, ResourceApi, ImageApi
 
 
 class ImageBuildService: