Add Renovate workflow configuration for automated dependency updates

.gitea/workflows/renovate.yml

@@ -0,0 +1,23 @@
+name: renovate
+
+on:
+  schedule:
+    - cron: "@daily"
+  push:
+    branches:
+      - main
+      - master
+
+jobs:
+  renovate:
+    runs-on: ubuntu-latest
+    container: ghcr.io/renovatebot/renovate:37.20.2
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - name: Fetch remote configuration
+        run: curl -sL https://git.quad4.io/Quad4-Extra/renovate-config/raw/branch/master/config.js -o config.js
+      - run: renovate
+        env:
+          RENOVATE_CONFIG_FILE: "config.js"
+          LOG_LEVEL: "debug"
+          RENOVATE_TOKEN: ${{ secrets.RENOVATE_TOKEN }}