add metrics workflow

Author: 123-hub-afk

.github/workflows/metrics.yml

@@ -0,0 +1,18 @@
+name: Metrics
+on:
+  schedule: [{ cron: "0 0 * * *" }]  # запускается каждый день в полночь
+  workflow_dispatch:                # разрешает ручной запуск
+
+jobs:
+  github-metrics:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: lowlighter/metrics@latest
+        with:
+          filename: metrics.plugin.activity.svg
+          token: ${{ secrets.METRICS_TOKEN }}
+          base: ""
+          plugin_activity: yes
+          plugin_activity_limit: 5
+          plugin_activity_days: 0
+          plugin_activity_filter: issue, pr, release, fork, review, ref/create