Add rule-set releases

Makefile

@@ -0,0 +1,17 @@
+fmt:
+	@gofumpt -l -w .
+	@gofmt -s -w .
+	@gci write --custom-order -s standard -s "prefix(github.com/sagernet/)" -s "default" .
+
+fmt_install:
+	go install -v mvdan.cc/gofumpt@latest
+	go install -v github.com/daixiang0/gci@latest
+
+lint:
+	golangci-lint run ./...
+
+lint_install:
+	go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
+
+test:
+	go test -v ./...