Pyspssio

- Added basic CLI support (pipx compatibility)
- `read_sav` new parameter `data_only`. False (default) returns both dataframe and metadata, while True returns dataframe only.

Improved locale handling.

**Full Changelog**: https://github.com/stspec/pyspssio/compare/v0.4.2...v0.4.3

Fixed handling of multi-byte encodings/characters when reading multi response set metadata.

Fixed a bug that caused an exception to be raised when writing SPSS files from dataframes that contain nullable integer types (ex. Int64 column with pd.NA values).

**Full Changelog**: https://github.com/stspec/pyspssio/compare/v0.4.0...v0.4.1

Adds read and write support for "extended" multi response set definitions.

**Full Changelog**: https://github.com/stspec/pyspssio/compare/v0.3.1...v0.4.0

testing versioneer