Revert "refer to single package entrypoint (tableau#1739)"

This reverts commit 043efa1.

Author: jorwoods

pyproject.toml

@@ -36,7 +36,8 @@ test = ["black==24.10", "build", "mypy==1.4", "pytest>=7.0", "pytest-cov", "pyte
     "pytest-xdist", "requests-mock>=1.0,<2.0", "types-requests>=2.32.4.20250913"]
 
 [tool.setuptools.packages.find]
-where = ["tableauserverclient"]
+where = ["tableauserverclient", "tableauserverclient.helpers", "tableauserverclient.models", "tableauserverclient.server", "tableauserverclient.server.endpoint"]
+
 [tool.setuptools.dynamic]
 version = {attr = "versioneer.get_version"}