feat(packaging) + chore(workplan): complete T04 for CYA-WP-0004 — MANIFEST.in, pyproject improvements, verified clean sdist+wheel build and install

pyproject.toml

@@ -35,6 +35,11 @@ where = ["src"]
 
 [tool.setuptools]
 zip-safe = false
+include-package-data = true
+license-files = ["LICENSE"]
+
+[tool.setuptools.package-data]
+"*" = ["py.typed"]
 
 [project.urls]
 Homepage = "https://github.com/worsch/can-you-assist"