Improve index page with Quick Start and dropdown TOC navigation

- Add sphinx-design dependency for dropdown directive support
- Add Quick Start section with install command and example code
- Organize toctree into categorized dropdown sections: Getting Started,
  Cursors, Integrations, Advanced Topics, API Reference
- Sidebar now shows grouped navigation with section headings

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: laughingman7743

docs/conf.py

@@ -117,6 +117,7 @@ def setup(app):
     "sphinx.ext.githubpages",
     "sphinx_multiversion",
     "sphinxext.opengraph",
+    "sphinx_design",
 ]
 
 try:

docs/index.md

@@ -4,24 +4,86 @@
 
 PyAthena is a Python [DB API 2.0 (PEP 249)](https://www.python.org/dev/peps/pep-0249/) client for [Amazon Athena](https://docs.aws.amazon.com/athena/latest/APIReference/Welcome.html).
 
+## Quick Start
+
+```bash
+pip install PyAthena
+```
+
+```python
+from pyathena import connect
+
+cursor = connect(
+    s3_staging_dir="s3://YOUR_S3_BUCKET/path/to/",
+    region_name="us-west-2"
+).cursor()
+
+cursor.execute("SELECT 1")
+print(cursor.fetchone())
+```
+
 (documentation)=
 
 ## Documentation
 
+:::{dropdown} Getting Started
+
 ```{toctree}
 :maxdepth: 2
-:caption: Contents:
+:caption: Getting Started
 
 introduction
 usage
+```
+
+:::
+
+:::{dropdown} Cursors
+
+```{toctree}
+:maxdepth: 2
+:caption: Cursors
+
 cursor
-null_handling
-sqlalchemy
 pandas
 arrow
 polars
 s3fs
 spark
+```
+
+:::
+
+:::{dropdown} Integrations
+
+```{toctree}
+:maxdepth: 2
+:caption: Integrations
+
+sqlalchemy
+```
+
+:::
+
+:::{dropdown} Advanced Topics
+
+```{toctree}
+:maxdepth: 2
+:caption: Advanced Topics
+
+null_handling
 testing
+```
+
+:::
+
+:::{dropdown} API Reference
+
+```{toctree}
+:maxdepth: 2
+:caption: API Reference
+
 api
 ```
+
+:::

pyproject.toml

@@ -76,6 +76,7 @@ dev = [
     "sphinxext-opengraph",
     "furo",
     "myst-parser",
+    "sphinx-design",
     "types-python-dateutil",
 ]