chore: move lint targets to a sub Makefile

Makefile

@@ -1,3 +1,4 @@
+include scripts/lint.mk
 include scripts/clients.mk
 .DEFAULT_GOAL := help
 
@@ -60,36 +61,6 @@ simplecross: $(BUILD_DIR) ## Cross-compile go binaries without using CGO.
 clean: ## Clean the binary folder.
 	$(RM) -r $(BUILD_DIR)
 
-##@ Lint
-
-# Add missing and remove unused modules.
-.PHONY: tidy
-tidy:
-	go mod tidy
-
-# Run `go fmt` against code.
-.PHONY: fmt
-fmt:
-	go fmt ./...
-
-# Run `go vet` and `shadow` (which reports shadowed variables) against code.
-# https://pkg.go.dev/golang.org/x/tools/go/analysis/passes/shadow
-# `go install golang.org/x/tools/go/analysis/passes/shadow/cmd/shadow@latest`
-.PHONY: vet
-vet:
-	go vet ./...
-	shadow ./...
-
-# Run `golangci-lint` against code.
-# `golangci-lint` runs `gofmt`, `govet`, `staticcheck` and other linters.
-# https://golangci-lint.run/usage/install/#local-installation
-.PHONY: golangci-lint
-golangci-lint:
-	golangci-lint run --fix --timeout 5m
-
-.PHONY: lint
-lint: tidy vet golangci-lint ## Run linters.
-
 ##@ Test
 
 .PHONY: test

scripts/lint.mk

@@ -0,0 +1,29 @@
+##@ Lint
+
+# Add missing and remove unused modules.
+.PHONY: tidy
+tidy:
+	go mod tidy
+
+# Run `go fmt` against code.
+.PHONY: fmt
+fmt:
+	go fmt ./...
+
+# Run `go vet` and `shadow` (which reports shadowed variables) against code.
+# https://pkg.go.dev/golang.org/x/tools/go/analysis/passes/shadow
+# `go install golang.org/x/tools/go/analysis/passes/shadow/cmd/shadow@latest`
+.PHONY: vet
+vet:
+	go vet ./...
+	shadow ./...
+
+# Run `golangci-lint` against code.
+# `golangci-lint` runs `gofmt`, `govet`, `staticcheck` and other linters.
+# https://golangci-lint.run/usage/install/#local-installation
+.PHONY: golangci-lint
+golangci-lint:
+	golangci-lint run --fix --timeout 5m
+
+.PHONY: lint
+lint: tidy vet golangci-lint ## Run linters.