Introduce an AI Policy

[sobolevn]

I see that we receive quite a lot of AI generated PRs.

Maybe we should adopt an AI Policy?
Here's what we do in my other projects:

1. https://github.com/wemake-services/django-modern-rest/blob/master/.github/AI_POLICY.md (copied from Astral)
2. https://github.com/wemake-services/django-modern-rest/blob/5047e204501e35cb0fc184548be80bad53244f3f/.github/pull_request_template.md#L12

It may improve the situation maybe a little bit? :)

[provinzkraut]

Yes, I like the idea. @litestar-org/maintainers?

[Kumzy]

Can we apply this to all repositories of the org?