[AK-Lmn]

Closes #15

Summary

Adds PEP 561 \py.typed\ inline type hints marker to allow external type checkers (mypy, pyright, Pylance) to inspect \�oothpy's type annotations.

Changes

• Created \src/booth/py.typed.
• Added [tool.setuptools.package-data]\ in \pyproject.toml\ to ensure \py.typed\ is packaged in built wheels and source distributions.
• Added \�ttempt.confidence is not None\ check in \src/booth/core.py\ to resolve operand type comparison with \ hreshold\ in type checkers.

Verification

• Verified wheel build via \python -m build\ confirms \�ooth/py.typed\ is included in \�oothpy-0.5.3-py3-none-any.whl.
• Ran \mypy src/booth/: \Success: no issues found in 2 source files.
• Ran \pytest: all 308 tests pass cleanly.

[Vedantgitbot]

Thanks @AK-Lmn , this is a clean first PR. Appreciate you calling out the None guard in core.py yourself and including the mypy and wheel verification. Merging now.