Add renovate pipeline (#83)

Author: vicentepinto98

.github/renovate.json

@@ -0,0 +1,15 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["config:recommended"],
+  "prHourlyLimit": 10,
+  "labels": ["renovate"],
+  "repositories": ["stackitcloud/stackit-cli"],
+  "enabledManagers": ["gomod", "github-actions"],
+  "packageRules": [
+    {
+      "matchSourceUrls": ["https://github.com/stackitcloud/stackit-sdk-go"],
+      "groupName": "STACKIT SDK modules"
+    }
+  ],
+  "postUpdateOptions": ["gomodTidy", "gomodUpdateImportPaths"]
+}

.github/workflows/renovate.yaml

@@ -0,0 +1,19 @@
+name: Renovate
+
+on:
+  schedule:
+    - cron: "0 0 * * *"
+  workflow_dispatch:
+
+jobs:
+  renovate:
+    name: Renovate
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Self-hosted Renovate
+        uses: renovatebot/[email protected]
+        with:
+          configurationFile: .github/renovate.json
+          token: ${{ secrets.RENOVATE_TOKEN }}