🐎 ci: Add workflow for building docs

Author: caoccao

.github/workflows/build_docs.yml

@@ -0,0 +1,77 @@
+# Simple workflow for deploying static content to GitHub Pages
+name: Build Docs
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+    paths:
+      - "**"
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  # Single deploy job since we're just deploying
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
+
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12' 
+      
+      - name: Build Docs
+        run: |
+          cd docs
+          sudo apt-get install -y python3-sphinx
+          pip3 install -r requirements.txt
+          sphinx-build -M html ./ ./build
+
+      - name: Set up JDK 8
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'corretto'
+          java-version: '8'
+
+      - name: Setup Gradle
+        uses: gradle/gradle-build-action@v3
+        with:
+          gradle-version: 8.5
+
+      - name: Build Javadoc
+        run: gradle javadoc
+
+      - name: Copy Javadoc
+        run: cp -rf build/docs/javadoc docs/build/html/reference
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          # Upload entire repository
+          path: 'docs/build/html'
+
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4