Update release workflow to use Makefile for building and packaging; add smoke test step

Makefile

@@ -1,4 +1,4 @@
-.PHONY: setup run build clean
+.PHONY: setup run build smoke clean
 
 setup:
 	uv venv
@@ -8,7 +8,14 @@ run:
 	uv run python scripts/planka_cli.py status
 
 build:
-	uv run pyinstaller --onefile --name planka-cli scripts/planka_cli.py
+	uv run pyinstaller --onefile --name planka-cli --collect-all plankapy scripts/planka_cli.py
+
+smoke: build
+	@tmp_home="$$(mktemp -d)"; \
+	env -i PATH="/usr/bin:/bin:/usr/sbin:/sbin" HOME="$$tmp_home" \
+		PYTHONNOUSERSITE=1 PYTHONPATH= PYTHONHOME= \
+		./dist/planka-cli --help; \
+	rm -rf "$$tmp_home"
 
 clean:
 	rm -rf dist build *.spec __pycache__ scripts/__pycache__