Add PEP 561 py.typed marker for type checker support

Enables type checkers like mypy to recognize cmdweaver's type hints when used as a dependency. Projects using cmdweaver no longer need to create stub files (.pyi) manually.

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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: eferro

cmdweaver/py.typed

@@ -64,6 +64,9 @@ packages = ["cmdweaver"]
 [tool.setuptools.package-dir]
 "" = "."
 
+[tool.setuptools.package-data]
+cmdweaver = ["py.typed"]
+
 [tool.setuptools.exclude-package-data]
 "*" = ["examples/*", "tests/*"]