v0.1.0

Initial release. Ships with:

• envbool(var) — reads an env var and returns a bool
• to_bool(value) — coerces an arbitrary string to bool
• Strict mode via strict=True — raises InvalidBoolValueError on unrecognized values
• Customizable value sets via extend_truthy / extend_falsy / truthy / falsy
• CLI with exit-code semantics (0 truthy, 1 falsy) and --print flag for subshell use
• TOML config support (envbool.toml or [tool.envbool] in pyproject.toml)