v0.1.2

Changed

• examples/ split into examples/nfe/ and examples/nfse/, one script per field variant instead of two large catalog scripts.
• Multi-line docstrings collapsed to a single line across stackin/core.

Fixed

• examples/nfse/with_tax_retained.py/full.py now pass a recipient_address — required by the API when tax_retained=True.

Added

• Full unittest.TestCase coverage for stackin.core.client, stackin.br.product, stackin.br.tax, stackin.core.address, stackin.core.exceptions, stackin.core.types (100%).