ci: deploy docs to gh-pages branch

Author: wxj630

.github/workflows/docs.yml

@@ -7,20 +7,20 @@ on:
   workflow_dispatch:
 
 permissions:
-  contents: read
-  pages: write
-  id-token: write
+  contents: write
 
 concurrency:
-  group: pages
-  cancel-in-progress: false
+  group: docs
+  cancel-in-progress: true
 
 jobs:
-  build:
+  deploy:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
 
       - name: Set up Python
         uses: actions/setup-python@v5
@@ -37,18 +37,5 @@ jobs:
       - name: Build documentation
         run: mkdocs build --strict
 
-      - name: Upload GitHub Pages artifact
-        uses: actions/upload-pages-artifact@v5
-        with:
-          path: site
-
-  deploy:
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
-    runs-on: ubuntu-latest
-    needs: build
-    steps:
-      - name: Deploy to GitHub Pages
-        id: deployment
-        uses: actions/deploy-pages@v5
+      - name: Deploy to gh-pages
+        run: mkdocs gh-deploy --force --no-history