chore: add Makefile

Makefile

@@ -0,0 +1,28 @@
+.POSIX:
+.SUFFIXES:
+
+all: test lint
+
+test:
+	go test -race -shuffle=on -cover ./...
+
+test/cover:
+	go test -race -shuffle=on -coverprofile=coverage.out ./...
+	go tool cover -html=coverage.out
+
+lint:
+	golangci-lint run
+
+tidy:
+	go mod tidy
+
+generate:
+	go generate ./...
+
+# run `make pre-commit` once to install the hook.
+pre-commit: .git/hooks/pre-commit test lint tidy generate
+	git diff --exit-code
+
+.git/hooks/pre-commit:
+	echo "make pre-commit" > .git/hooks/pre-commit
+	chmod +x .git/hooks/pre-commit