Python: Split Python docs

.asf.yaml

@@ -42,6 +42,8 @@ github:
     - SreeramGarlapati
     - samredai
     - Fokko
+  ghp_branch: gh-pages
+  ghp_path: ~
 
 notifications:
     commits:      commits@iceberg.apache.org

.github/workflows/python-ci-docs.yml

@@ -0,0 +1,59 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+name: "Python Docs"
+on:
+  push:
+    branches:
+      - 'master'
+    paths:
+      - 'python/docs/**'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
+jobs:
+  docs:
+    runs-on: ubuntu-20.04
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python }}
+      - name: Install
+        working-directory: ./python/mkdocs
+        run: pip install -r requirements.txt
+      - name: Build
+        working-directory: ./python/mkdocs
+        run: mkdocs build
+      - name: Copy
+        working-directory: ./python/mkdocs
+        run: mv ./site /tmp/site
+      - name: Push changes to gh-pages branch
+        run: |
+          git checkout --orphan gh-pages-tmp
+          git rm --quiet -rf .
+          cp -r /tmp/site/* .
+          git config --global user.name 'GitHub Actions'
+          git config --global user.email 'actions@github.com'
+          git add --all
+          git commit -m 'Publish Python docs'
+          git push -f origin gh-pages-tmp:gh-pages || true