Add Renovate for automated dependency updates

.github/workflows/renovate.yml

@@ -0,0 +1,31 @@
+name: Renovate
+
+on:
+  workflow_dispatch:
+    inputs:
+      dryRun:
+        description: 'Dry run (no PRs will be created)'
+        required: false
+        default: 'false'
+        type: choice
+        options:
+          - 'true'
+          - 'false'
+  schedule:
+    - cron: '0 0 * * 1'  # Every Monday at 00:00 UTC
+
+jobs:
+  renovate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Run Renovate
+        uses: renovatebot/github-action@v41
+        with:
+          configurationFile: renovate.json
+          token: ${{ secrets.RENOVATE_TOKEN }}
+        env:
+          LOG_LEVEL: info
+          RENOVATE_DRY_RUN: ${{ github.event.inputs.dryRun }}

renovate.json

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+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:base"
+  ],
+  "labels": ["dependencies"],
+  "prHourlyLimit": 2,
+  "prConcurrentLimit": 5,
+  "schedule": ["before 9am on monday"]
+}