Fix ReadTheDocs configuration

Fix .readthedocs.yaml configuration to resolve documentation build failure:

1. Update Sphinx configuration path from 'docs/conf.py' to 'docs/source/conf.py'
   (ReadTheDocs was looking for conf.py in wrong location)

2. Add Python package installation with docs dependencies:
   - Install package with pip method
   - Include docs extra requirements for Sphinx dependencies

This resolves the "Expected file not found: docs/conf.py" error
and ensures ReadTheDocs can build the documentation properly.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

Author: jeremymanning

.readthedocs.yaml

@@ -14,11 +14,12 @@ build:
 
 # Build documentation in the "docs/" directory with Sphinx
 sphinx:
-   configuration: docs/conf.py
+   configuration: docs/source/conf.py
 
-# Optionally, but recommended,
-# declare the Python requirements required to build your documentation
-# See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
-# python:
-#    install:
-#    - requirements: docs/requirements.txt
+# Install the package with docs dependencies
+python:
+   install:
+   - method: pip
+     path: .
+     extra_requirements:
+       - docs