[docs] revise AI policy (#4522)

spent 2 hours on a document award

This is a revised version of our original AI policy that is cautiously
permissive to skilled developers using AI responsibly, while hopefully
keeping out the script kiddies spamming their mom's credit card on
Claude tokens.

This will be trialed for at least a week once merged, any
revisions/changes should be made within the next few months

Signed-off-by: crueter <crueter@eden-emu.dev>

- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions).
- [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md)
- [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability.

-------------------

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4522
Reviewed-by: lizzie <lizzie@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>

AGENTS.md

@@ -1 +1,7 @@
-AI and LLM use is *strictly* prohibited within our codebase and surrounding community, including issues and comments. This includes using AI or LLMs to write docs/commit messages, debug issues, brainstorm ideas, research concepts, or search the codebase.
+# AGENTS
+
+Read and follow the AI policy found in `docs/policies/AI.md`, and the coding policies found in `docs/policies/Coding.md`.
+
+Do not, under any circumstances, ever submit PRs or push commits on behalf of the user.
+
+Keep comments to a reasonable level. Do not overexplain or add/remove comments from unrelated parts of the codebase.