feat: add Makefile for easy build and test

Makefile

@@ -0,0 +1,27 @@
+.PHONY: install test build clean help
+
+install:
+	pip install -e ".[dev]"
+
+test:
+	pytest tests/ -v
+
+build:
+	python -m build
+
+clean:
+	rm -rf dist/ build/ .venv/
+	find . -type d -name __pycache__ -exec rm -rf {} +
+	find . -type f -name "*.pyc" -delete
+
+help:
+	@echo "Available commands:"
+	@echo "  make install  - Install in development mode"
+	@echo "  make test     - Run tests"
+	@echo "  make build    - Build package"
+	@echo "  make clean    - Clean build artifacts"
+	@echo "  make          - Run tests (default)"
+
+.DEFAULT_GOAL := help
+
+test: test