Add stale repos action

Signed-off-by: Matej Feder <matej.feder@dnation.cloud>

.github/workflows/stale-repos.yml

@@ -0,0 +1,52 @@
+---
+name: stale repo identifier
+
+"on":
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+      - get_stale  # Only for tests
+  schedule:
+    - cron: "3 2 1 * *"
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    name: stale repo identifier
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      issues: write
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Run stale_repos tool
+        uses: github/stale-repos@v2.1.1
+        env:
+          GH_TOKEN: ${{ secrets.GHP_MFEDER }}
+          ORGANIZATION: SovereignCloudStack
+          INACTIVE_DAYS: 365
+          ACTIVITY_METHOD: "pushed"
+          ADDITIONAL_METRICS: "release,pr"
+
+      # This next step updates an existing issue. If you want a new issue every time, remove this step and remove the `issue-number: ${{ env.issue_number }}` line below.
+      - name: Check for the stale report issue
+        run: |
+          ISSUE_NUMBER=$(gh search issues "Stale repository report" --match title --json number --jq ".[0].number")
+          echo "issue_number=$ISSUE_NUMBER" >> "$GITHUB_ENV"
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create issue
+        uses: peter-evans/create-issue-from-file@v5
+        with:
+          issue-number: ${{ env.issue_number }}
+          title: Stale repository report
+          content-filepath: ./stale_repos.md
+          labels: |
+            report