Add ReadTheDocs configuration and update doc requirements

- Add .readthedocs.yaml for RTD v2 config
- Update docs/doc_requirements.txt with modern package versions
- Configure Python 3.11 build environment

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: jeremymanning

.readthedocs.yaml

@@ -0,0 +1,18 @@
+# Read the Docs configuration file for Sphinx projects
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+version: 2
+
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+
+sphinx:
+  configuration: docs/conf.py
+
+python:
+  install:
+    - requirements: docs/doc_requirements.txt
+    - method: pip
+      path: .

docs/doc_requirements.txt

@@ -1,18 +1,17 @@
-sphinx==1.5.5
-sphinx_bootstrap_theme==0.4.13
+sphinx>=4.0
+sphinx_bootstrap_theme
 sphinx-gallery
 numpydoc
 nbsphinx
-seaborn>=0.7.1
-matplotlib>=1.5.1
-scipy>=0.17.1
-numpy>=1.10.4
-pandas==0.18.1
-future
+seaborn>=0.12.0
+matplotlib>=3.5.0
+scipy>=1.10.0
+numpy>=2.0.0
+pandas>=2.0.0
+joblib>=1.3.0
 sqlalchemy
-dill
 requests
 pydub
-multiprocessing
 pathos
 jupyter_client
+ipykernel