Custom Vulkan::cppm CMake target code doesn't work with tutorial C++ code

[katas94]

In the Developer environment chapter, within the Common considerations > CMake section, there is some code that declares a custom Vulkan::cppm target to use with your CMake project. While trying to setup my CMake project I was not being able to compile C++ code that I got from the tutorial. The issue was that VULKAN_HPP_NO_STRUCT_CONSTRUCTORS was undefined, contrary to how Vulkan::cppm is initialized in the actual CMakeLists.txt from the tutorial repo, where the define is set. Adding the define like this fixed the issue:

target_compile_definitions(VulkanCppModule PUBLIC
        VULKAN_HPP_DISPATCH_LOADER_DYNAMIC=1
        VULKAN_HPP_NO_STRUCT_CONSTRUCTORS=1
)

It is probably worth to mention this, or add the define in the example CMake code just as it is defined in the tutorial code.

[gpx1000]

This is an issue that I originally rewrote the tutorial without using VULKAN_HPP_NO_STRUCT_CONSTRUCTORS. It enables one extra level of syntatic sugar in the sense that you get to use default constructors and not have to define/write as much. However, we decided that for a tutorial, it's best to be explicit with the constructor setups so, we'd opt for turning off the default constructors and use designated initializers in most places to help add clarity as it is a tutorial. I'll make a new PR that addresses the change by adding a define for that in the tutorial. Might add a section to detail the pros/cons of it, or might leave it as a thing for people to discover.