chore: Update nvidia text default model alias to nano v3

[nabinchha]

Closes #132

#106 and #124 need to merge first.

Ran make convert-execute-notebooks locally to verify these notebooks run after the model id update to nano v3.

nmulepati@nmulepati-mlt DataDesigner % make convert-execute-notebooks
📓 Converting Python tutorials to notebooks and executing...
cp docs/notebook_source/_README.md docs/notebooks/README.md
cp docs/notebook_source/_pyproject.toml docs/notebooks/pyproject.toml
uv run --group notebooks --group docs jupytext --to ipynb --execute docs/notebook_source/*.py
[jupytext] Reading docs/notebook_source/1-the-basics.py in format py
[jupytext] Executing notebook with kernel python3
[jupytext] Writing docs/notebook_source/1-the-basics.ipynb
[jupytext] Reading docs/notebook_source/2-structured-outputs-and-jinja-expressions.py in format py
[jupytext] Executing notebook with kernel python3
[jupytext] Writing docs/notebook_source/2-structured-outputs-and-jinja-expressions.ipynb
[jupytext] Reading docs/notebook_source/3-seeding-with-a-dataset.py in format py
[jupytext] Executing notebook with kernel python3
[jupytext] Writing docs/notebook_source/3-seeding-with-a-dataset.ipynb
[jupytext] Reading docs/notebook_source/4-providing-images-as-context.py in format py
[jupytext] Executing notebook with kernel python3
[jupytext] Writing docs/notebook_source/4-providing-images-as-context.ipynb
mv docs/notebook_source/*.ipynb docs/notebooks/
rm -r docs/notebook_source/artifacts
rm docs/notebook_source/*.csv
✅ Notebooks created in docs/notebooks/

The base branch was changed.