Narwhals v1.25.0

Changes

✨ Enhancements

• feat: add LazyFrame.explode for duckdb (#1891)
• feat: add duckdb .str.to_datetime (#1916)
• feat: enable ModuleType and str for backend in .lazy() method (#1914)
• feat: add LazyFrame.unpivot for spark and duckdb (#1890)
• feat: LazyFrame.collect with backend and **kwargs (#1734)
• feat: spark date and datetimedata types, allow for dtype in nw.lit for pyspark (#1913)

📖 Documentation

• docs: Minor rendering fixups, inherit all exceptions from NarwhalsError (#1919)
• docs: shorten docstring examples in narwhals/expr.py (#1915)

🛠️ Other improvements

• chore: simplify duckdb group-by (#1911)

Thank you to all our contributors for making this release possible!
@FBruzzesi, @osoucy , and @MarcoGorelli