AI assistance disclosure (#7212)

* AI disclosure templates

* Update assistance disclosure

* Add AI moderator

* Set read permissions by default

* Pin to hash

.github/workflows/ai.yml

@@ -16,8 +16,8 @@ jobs:
       models: read
       contents: read
     steps:
-      - uses: actions/checkout@v4
-      - uses: github/ai-moderator@v1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
+      - uses: github/ai-moderator@6bcdb2a79c2e564db8d76d7d4439d91a044c4eb6
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           spam-label: 'spam'