feat(python): align to_pandas pandas kwargs (#3397)

## Feature

This PR aligns LanceDB Python `to_pandas()` APIs with Lance pandas
conversion capabilities while keeping LanceDB query-specific semantics
intact.

- Adds `blob_mode` and pandas `**kwargs` support to local table
`to_pandas()`.
- Delegates local `LanceTable.to_pandas()` to Lance dataset
`to_pandas(blob_mode=..., **kwargs)`.
- Keeps remote table `to_pandas()` unsupported with
`NotImplementedError`.
- Allows sync and async query `to_pandas()` to forward pandas kwargs
after LanceDB `flatten` and `timeout` handling.

Why we need this feature:

Users can access Lance blob-aware pandas conversion from LanceDB local
tables and can pass PyArrow pandas conversion options through
table/query APIs without losing existing `flatten` or `timeout`
behavior.

How it works:

The table API exposes a `BlobMode` literal type for `lazy`, `bytes`, and
`descriptions`. Local tables call through to the backing Lance dataset.
Query APIs do not add `blob_mode`; they materialize Arrow results, apply
LanceDB flattening when requested, and then call `to_pandas(**kwargs)`.

## Validation

- `uv run --frozen --extra tests pytest
python/tests/test_table.py::test_table_to_pandas_default_matches_arrow
python/tests/test_table.py::test_table_to_pandas_blob_bytes
python/tests/test_table.py::test_table_to_pandas_kwargs
python/tests/test_query.py::test_query_to_pandas_kwargs
python/tests/test_query.py::test_query_timeout
python/tests/test_remote_db.py::test_table_to_pandas_not_supported`
- `uv run --frozen --extra dev ruff check python/lancedb/table.py
python/lancedb/query.py python/lancedb/remote/table.py
python/tests/test_table.py python/tests/test_query.py
python/tests/test_remote_db.py`
- `uv run --frozen --extra tests pytest python/tests/test_table.py
python/tests/test_query.py python/tests/test_remote_db.py`

Note: `python/uv.lock` was intentionally not committed in this branch.

python/python/tests/test_query.py

@@ -165,6 +165,22 @@ def test_offset(table):
     assert len(results_with_offset.to_pandas()) == 1
 
 
+@pytest.mark.asyncio
+async def test_query_to_pandas_kwargs(table, table_async):
+    sync_df = (
+        LanceVectorQueryBuilder(table, [0, 0], "vector")
+        .select(["id"])
+        .limit(1)
+        .to_pandas(split_blocks=True)
+    )
+    assert sync_df["id"].tolist() == [1]
+
+    async_df = await (
+        table_async.query().select(["id"]).limit(2).to_pandas(split_blocks=True)
+    )
+    assert async_df["id"].tolist() == [1, 2]
+
+
 def test_order_by_plain_query(mem_db):
     table = mem_db.create_table(
         "test_order_by",