Update AI Policy

[waylan]

Explicitly require AI use disclosure and require use of PR & Issue templates when provided. This should give us the justification to easily close all submissions that are obviously autonomously submitted.

By way of explanation, I am assuming that any submission which deletes the template is an autonomous submission (autonomous submissions are already expressly not allowed). I realize that there may be humans who delete templates also, but the policy requires the template regardless and I am okay with closing both. We currently do not have any templates for issues, but I think the way the policy is written that is accounted for with no changes being necessary if/when we add templates for issues.

AI Assistance Disclosure

• No AI tools were used in preparing this PR.
• If AI tools were used, I have disclosed which ones, and fully reviewed and verified their output.

Checklist

• This PR follows the contribution guidelines.
• The code follows the Code Style Guide.
• The commit message follows the Commit Message Style Guide.
• I have added or updated relevant docs, including release notes if applicable which follow the Documentation Style Guide.
• I have added or updated relevant tests.
• I have not requested, and will not request, an automated AI review for this PR.