Use option/cmakedefine01 for VSG_SUPPORTS_ShaderCompiler/Windowing

[dg0yt]

Description

This PR adopts the boolean CMake option in combination with #cmakedefine01 for the VSG_SUPPORTS_ShaderCompiler and VSG_SUPPORTS_Windowing options.
This pattern is already in use for VSG_SUPPORTS_ShaderOptimizer. It makes it easy to discover the boolean nature of the option, and it makes it hard to pass an unsuitable value. (This PR is triggered by unexpected trouble from using -DVSG_SUPPORTS_Windowing=ON`.)

Type of change

• Non-breaking change which facilitates configuration.
• A documentation update might not be needed.

How Has This Been Tested?

• The cmakedefine change for VSG_SUPPORTS_Windowing is added as a patch to the vcpkg port in [vcpkg baseline][vsg] Features for installation order control microsoft/vcpkg#47863. The generated Version.h was checked locally.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules