Add Renovate GitHub Action workflow

Introduce a new GitHub Action workflow to automate dependency updates using Renovate. This setup includes a scheduled job and a configuration file for managing and tracking dependencies via the Dependency Dashboard.

.github/renovate-global.json

@@ -0,0 +1,10 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "branchPrefix": "github-renovate/",
+  "dependencyDashboardTitle": "Dependency Dashboard self-hosted",
+  "gitAuthor": "Renovate Bot <[email protected]>",
+  "onboarding": true,
+  "onboardingBranch": "github-renovate/configure",
+  "platform": "github",
+  "repositories": []
+}

.github/workflows/renovate.yml

@@ -0,0 +1,17 @@
+name: Renovate
+on:
+  schedule:
+    # The "*" (#42, asterisk) character has special semantics in YAML, so this
+    # string has to be quoted.
+    - cron: '0/15 * * * *'
+jobs:
+  renovate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/[email protected]
+      - name: Renovate Bot GitHub Action
+        uses: renovatebot/[email protected]
+        with:
+          configurationFile: .github/renovate-global.json
+          token: ${{ secrets.RENOVATE_TOKEN }}