* Keep Gemini code commented out in the notebook template

* disable progress bar to avoid leaking internal information

This change updates how we handle JSON data types read from BigQuery.

Previously, BigQuery JSON types were treated as generic large strings within our system. To improve accuracy and functionality, we now map them to a dedicated JSON data type (db_dtypes.JSONType or db_dtypes.JSONArrowType for pyarrow).

While this provides a more appropriate representation of JSON data, it's important to note that this feature is still in preview and may evolve.

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Tim Sweña (Swast) <swast@google.com>
Release-As: 1.34.0

…catter() (#1320)

* refactor: rename the bigframes function files

* fix the import

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

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Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

* define timedelta type and to_timedelta function

* remove unnecessary file

* remove TypeAlias type for 3.9 compatibility

* fix mypy

* fix lint

* move timedelta out of the simple dtype list

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* fix type casts in tests

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Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>