Add OWASP AI Testing Guide metadata

Generated on 2025-10-02 by Arkadii Yakovets as part of the OWASP Schema initiative within OWASP Nest.
Repository: `OWASP/www-project-ai-testing-guide`

Co-authored-by: Arkadii Yakovets <arkadii.yakovets@owasp.org>

.github/workflows/validate-owasp-metadata.yaml

@@ -0,0 +1,24 @@
+name: Validate OWASP entity metadata
+
+on:
+  pull_request:
+    paths:
+      - '*.owasp.yaml'
+  push:
+    paths:
+      - '*.owasp.yaml'
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.repository }}-${{ github.workflow }}-${{ github.ref }}
+
+jobs:
+  validate-metadata:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v5
+
+      - name: Validate metadata file
+        uses: owasp/nest-schema/.github/actions/validate@a733198b4a942eb12d3ee8629cd9e0d409b1b2b9