docs: add zensical docs build workflow

.github/workflows/docs.yml

@@ -0,0 +1,47 @@
+# SPDX-FileCopyrightText: 2026 California Institute of Technology.
+# SPDX-License-Identifier: MIT
+
+name: Render and deploy docs
+
+on:
+  push:
+    branches:
+      - master
+  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@v7
+
+      - name: Install the latest version of uv
+        uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
+
+      - name: Install dependencies
+        run: uv sync --extra docs
+
+      - name: Build docs
+        run: uv run zensical build
+
+      - uses: actions/upload-pages-artifact@v5
+        with:
+          path: site/
+
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deploy.outputs.page_url }}
+    steps:
+      - uses: actions/configure-pages@v6