There is a link to the «Bundle Programming Guide», follow it.
Please don't respond unless you can be helpful.
How is pointing out that there is a link to the documentation you need not being helpful???
Creating an Application Bundle
The simplest way to create an application bundle is using Xcode. All new application projects include an appropriately configured application target, which defines the rules needed to build an application bundle, including which source files to compile, which resource files to copy to the bundle, and so on. New projects also include a preconfigured Info.plist file and typically several other files to help you get started quickly. You can add any custom files as needed using the project window and configure those files using the Info or Inspector windows. For example, you might use the Info window to specify custom locations for resource files inside your bundle.
For information on how to configure targets in Xcode, see Xcode Build System Guide.
If you're refering to this section of that document, that is as useful as a colander being used to hold tomato soup.
I will look to see if I can take a pre-existing executable and build an Application Bundle through XCode but I don't think that Xcode was designed for that.
In this circumstance, I'm looking for instructions to convert an already compiled executable(from D Language using DUB) into an Application Bundle. I'm not taking just a C or C++ source code and compiling it. If I were, XCode would be my choice. However XCode is not a part of my workflow.
Please take an effort to diagnose the problem before pasting a solution that does not apply.
Sorry for my crankiness, I really do appreciate your attempts to help.