Add makefile for repo automation

Makefile

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+# spectrepy makefile
+
+.PHONY: help
+# Put it first so that "make" without argument is like "make help"
+# Adapted from:
+# https://marmelab.com/blog/2016/02/29/auto-documented-makefile.html
+help: ## List Makefile targets
+	$(info Makefile documentation)
+	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-10s\033[0m %s\n", $$1, $$2}'
+
+clean-tox:
+	rm --recursive --force ./.mypy_cache
+	rm --recursive --force ./.tox
+	rm --recursive --force tests/__pycache__/
+	rm --recursive --force .pytest_cache/
+	rm --force .coverage
+
+clean-py:
+	rm --recursive --force ./dist
+	rm --recursive --force ./build
+	rm --recursive --force ./*.egg-info
+	rm --recursive --force ./**/__pycache__/
+
+clean: clean-tox clean-py; ## Clean temp build/cache files and directories
+
+wheel: ## Build Python binary distribution wheel package
+	poetry build --format wheel
+
+source: ## Build Python source distribution package
+	poetry build --format sdist
+
+test: ## Run the project testsuite(s)
+	poetry run tox --recreate --parallel
+
+dev: ## Create the local dev environment
+	poetry install --with dev --sync
+	poetry run pre-commit install
+
+publish: test wheel source ## Build and upload to pypi (requires $PYPI_API_KEY be set)
+	@poetry publish --username __token__ --password $(PYPI_API_KEY)