Add ASF attribution

Author: simicd

.gitignore

@@ -31,3 +31,4 @@
 /package/*/apt/repositories/
 /package/*/apt/tmp/
 /package/docker/*.deb
+/venv/

doc/source/_templates/trademark.html

@@ -0,0 +1,10 @@
+{# Display the trademark information (which is defined in conf.py html_context). #}
+{% if show_copyright and trademark %}
+  <p class="trademark">
+    <div class="footer-item">
+      {% for trademark_line in trademark %}
+        <p>{{ trademark_line }}</p>
+      {% endfor %}
+    </div>
+  </p>
+{% endif %}

doc/source/conf.py

@@ -27,8 +27,13 @@
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
 
 project = 'Apache Arrow Flight SQL adapter for PostgreSQL'
-copyright = '2022-2023, Apache Arrow Developers'
-author = 'Apache Arrow Developers'
+copyright = '2019-2024, Apache Software Foundation'
+trademark = [
+    "Apache Arrow Flight, Arrow Flight, Apache, the Apache feather logo, and the Apache Arrow project logo",
+    "are either registered trademarks or trademarks of The Apache Software Foundation in the United States and other countries."
+]
+author = 'Apache Software Foundation'
+
 version = os.environ.get('VERSION')
 if not version:
     meson_build_path = pathlib.Path(__file__).parent / '../../meson.build'
@@ -96,12 +101,15 @@
     ],
     'use_edit_page_button': True,
     'show_nav_level': 2,
+    "footer_start": ["copyright", "trademark"],
+    "footer_end": ["sphinx-version", "theme-version"]
 }
 html_context = {
     'github_user': 'apache',
     'github_repo': 'arrow-flight-sql-postgresql',
     'github_version': 'main',
     'doc_path': 'doc/source',
+    'trademark': trademark
 }
 html_static_path = ['_static']
 html_favicon = "_static/favicon.ico"