chore: import upstream snapshot with attribution

.github/workflows/docs.yml

@@ -0,0 +1,51 @@
+name: docs
+
+# Build the MkDocs Material site and publish it via GitHub Pages.
+# Pages "Source" must be set to "GitHub Actions" (Settings -> Pages) — which it already is.
+# No gh-pages branch needed; this uses the official Pages deployment actions.
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - "docs/**"
+      - "mkdocs.yml"
+      - "POST_TRAINING.md"
+      - ".github/workflows/docs.yml"
+  workflow_dispatch: {}
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+      - name: Install docs dependencies
+        run: pip install mkdocs mkdocs-material pymdown-extensions
+      - name: Build the site (strict)
+        run: mkdocs build --strict --site-dir ./site
+      - uses: actions/configure-pages@v5
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          path: ./site
+
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - id: deployment
+        uses: actions/deploy-pages@v4