chore: onboard renovate, mark Makefile tool packages (#221)

chore: onboard renovate, mark `Makefile` tool packages (gitea/gitea-mcp#221)

Co-authored-by: silverwind <me@silverwind.io>

Makefile

@@ -3,8 +3,8 @@ EXECUTABLE := gitea-mcp
 VERSION ?= $(shell git describe --tags --always | sed 's/-/+/' | sed 's/^v//')
 LDFLAGS := -X "main.Version=$(VERSION)"
 
-GOLANGCI_LINT_PACKAGE ?= github.com/golangci/golangci-lint/v2/cmd/golangci-lint@v2.12.2
-GOVULNCHECK_PACKAGE ?= golang.org/x/vuln/cmd/govulncheck@v1.3.0
+GOLANGCI_LINT_PACKAGE ?= github.com/golangci/golangci-lint/v2/cmd/golangci-lint@v2.12.2 # renovate: datasource=go
+GOVULNCHECK_PACKAGE ?= golang.org/x/vuln/cmd/govulncheck@v1.3.0 # renovate: datasource=go
 
 .PHONY: help
 help: ## print this help message

renovate.json5

@@ -0,0 +1,6 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "local>gitea/renovate-config"
+  ],
+}