Wrap up common isort tasks in a makefile

Makefile

+.PHONY:
+help:
+	@echo "Usage:"
+	@echo "    make help             prints this help."
+	@echo "    make fix              fix import sort order."
+	@echo "    make sort             run the linter."
+
+.PHONY: fix
+fix:
+	isort -y
+
+.PHONY: sort
+sort:
+	@echo "Running Isort" && isort --check-only --diff || exit 1