Add what-if input range and rounding controls

[oegedijk]

Summary

• add feature input range overrides and rounding for what-if numeric inputs
• apply min/max/step to numeric input fields and update range label
• bump version to 0.5.7 and update release notes and TODO

Testing

• uv run pytest -q tests/test_feature_input_component.py::test_feature_input_component_respects_custom_range_and_rounding

Issues

• Closes whatif component customization limiting range and rounding off decimal value #277