Add Jupyter environment setup and notebook organization

- Add jupyter and ipykernel dependencies to pyproject.toml for proper VS Code integration
- Update PCA analysis notebook with version control strategy note
- Include new PCA analysis notebook copy (v002) for experimental work
- Update uv.lock with new Jupyter-related dependencies

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

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

Author: HAM41

notebooks/analysis/2025_03_10_PCA_trialavg.ipynb

@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Julie Charlton gave this folder to Hein to play around with and learn about how to get the DV from the actual neural spikes data. This file and "
+    "Julie Charlton gave this folder to Hein to play around with and learn about how to get the DV from the actual neural spikes data. This file is the original - I will keep it largely untouched and create a copy (v002) which I will play around with"
    ]
   },
   {