Add docs deployment workflow.

Author: alexmillane

.github/workflows/gh-pages.yml

@@ -0,0 +1,52 @@
+name: GitHub Pages
+
+on:
+  push:
+    branches: [ "v0.0.9-docs" ]
+
+# Concurrency control to prevent parallel runs on the same PR
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: write
+  pull-requests: write
+  checks: write
+  issues: read
+
+jobs:
+  deploy_docs:
+    name: Deploy the docs
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      # - name: Install git LFS (and tools needed by hooks)
+      #   run: |
+      #     apt-get update
+      #     apt-get install -y --no-install-recommends git git-lfs clang-format ca-certificates make
+      #     git --version
+      #     git lfs version
+
+      # Checkout Code
+      - name: Checkout Code
+        uses: actions/checkout@v4
+        with:
+          clean: true
+          fetch-depth: 0
+          fetch-tags: true
+
+      # Build docs
+      - name: Build docs
+        run: |
+          cd docs
+          pip3 install -r requirements.txt
+          make SPHINXOPTS=-W multi-docs
+          touch ./_build/.nojekyll
+
+      # Deploy to gh-pages
+      - name: Deploy to gh-pages
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./docs/_build