A simplified and more correct way to connect modern Unity

[memExpert]

Dear Rainer Poisel,

First, I would like to express my sincere gratitude for providing the initial example of integrating Unity with CMake. Your work has been immensely helpful and provided a solid foundation for my project.

While working with the example, I discovered a more efficient and modern approach to integrating Unity with CMake. This method simplifies the process and adheres more closely to current best practices. I have implemented these changes and would like to submit them for your consideration.

Thank you again for your excellent work. I look forward to your feedback on this contribution.

Best regards, Maksim Hanchar