Metasyn

Small release update with mainly documentation updates and small (bug)-fixes.

This release is a small bugfix release.

- Descriptions are now correctly read from file.
- Empty columns correctly keep their names.
- Compatible with latest version of polars.

New in this release:

This release switches the internal computation from polars to pandas. Pandas is still supported, but polars is recommended to use for the input dataframe. There are some simplifications internally due to this change, which will make future maintanance easier.

The tests should cover both polars and pandas dataframes, so if either doesn't work, please file an issue.

New in this release:

- `prop_missing` can now be added to the spec while importing a dataframe to manually set the portion of missing values.
- The regex distribution now also accepts "\d" or "\w", etc as a short-hand for "\d{1,1}" and "\w{1,1}" respectively.
- An error is now raised when the regex element is used more than 100% or less than 0% of the time.
- The `_example_distribution` method of distributions has been renamed to `default_distribution`.

New in this release:

- Bug fixes related to empty columns.
- Small API tweaks for disclosure control/privacy.
- Update README for PyPi

Initial release of MetaSynth.