release: include compiled extensions (*.so) in shim package-data (#36)

The shim setup.py extracts .so files from the wheel, but the
generated pyproject.toml didn't include them in package-data, so
they were excluded when uv built a local wheel from the source.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

release.sh

@@ -107,7 +107,7 @@ for toml in sorted(pathlib.Path(".").glob("*/pyproject.toml")):
     f"include = {json.dumps(find_include)}",
     "",
     "[tool.setuptools.package-data]",
-    f'{module} = ["{datadir}/**/*"]',
+    f'{module} = ["{datadir}/**/*", "*.so"]',
     "",
     "[tool.shim]",
     f'repo_url = "{repo_url}"',