[docs] Make "No AI / No LLM Policy" abundantly clear (#16285)

Acknowledgements:
- The simpler policy is heavily inspired by the Zig project's policy.
  See https://codeberg.org/ziglang/zig
- The `.NO_AI` idea is taken from https://github.com/nothings/stb

Authored by: bashonly

.github/ISSUE_TEMPLATE_tmpl/3_site_feature_request.yml

@@ -10,6 +10,8 @@ body:
       description: |
         Carefully read and work through this check list in order to prevent the most common mistakes and misuse of yt-dlp:
       options:
+        - label: I've read the [**NO AI / NO LLM POLICY**](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#no-ai--no-llm-policy) and understand I may be blocked from the repository if it is violated
+          required: true
         - label: I'm requesting a site-specific feature
           required: true
         - label: I've verified that I have **updated yt-dlp to nightly or master** ([update instructions](https://github.com/yt-dlp/yt-dlp#update-channels))
@@ -18,8 +20,6 @@ body:
           required: true
         - label: I've searched the [bugtracker](https://github.com/yt-dlp/yt-dlp/issues?q=is%%3Aissue%%20-label%%3Aspam%%20%%20) for similar requests **including closed ones**. DO NOT post duplicates
           required: true
-        - label: I've read the [policy against AI/LLM contributions](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#automated-contributions-ai--llm-policy) and understand I may be blocked from the repository if it is violated
-          required: true
         - label: I've read about [sharing account credentials](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#are-you-willing-to-share-account-details-if-needed) and I'm willing to share it if required
   - type: input
     id: region