add AI generated test cases for code generator

[WalterBright]

I thought it would be fun to add test cases for the arithmetic code generation using AI.

[dlang-bot]

Thanks for your pull request, @WalterBright!

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Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + dmd#22502"

[ibuclaw]

@WalterBright how does the use of AI to generate code align with existing copyright assignments and code licence?

[WalterBright]

Great question!

https://www.copyright.gov/ai/Copyright-and-Artificial-Intelligence-Part-2-Copyrightability-Report.pdf

See page 8.

The code was generated with a one line prompt. I translated the result from C to D. Based on the pdf, it is not copyrightable: "Copyright does not extend to purely AI-generated material, or material where there is insufficient human control over the expressive elements. "

[ibuclaw]

Right, so is there any concern with dmd and AI contributions? (#22262, #22276, #22285, #22349, ...)

[WalterBright]

Those PRs are highly unlikely to be copies of somebody else's code, so I'm not too concerned about it.