Add stale PR/Issue github workflow (#1126)

.github/workflows/stale.yml

@@ -0,0 +1,69 @@
+name: Stale
+
+# yamllint disable-line rule:truthy
+on:
+  schedule:
+    - cron: "0 0 * * *"
+  workflow_dispatch:
+
+jobs:
+  stale:
+    if: github.repository_owner == 'python-kasa'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Stale issues and prs
+        uses: actions/stale@v9.0.0
+        with:
+          repo-token: ${{ github.token }}
+          days-before-stale: 90
+          days-before-close: 7
+          operations-per-run: 250
+          remove-stale-when-updated: true
+          stale-issue-label: "stale"
+          exempt-issue-labels: "no-stale,help-wanted,needs-more-information,waiting-for-reporter"
+          stale-pr-label: "stale"
+          exempt-pr-labels: "no-stale"
+          stale-pr-message: >
+            There hasn't been any activity on this pull request recently. This
+            pull request has been automatically marked as stale because of that
+            and will be closed if no further activity occurs within 7 days.
+
+            If you are the author of this PR, please leave a comment if you want
+            to keep it open. Also, please rebase your PR onto the latest dev
+            branch to ensure that it's up to date with the latest changes.
+
+            Thank you for your contribution!
+          stale-issue-message: >
+            There hasn't been any activity on this issue recently. This issue has
+            been automatically marked as stale because of that. It will be closed
+            if no further activity occurs.
+
+            Please make sure to update to the latest python-kasa version and
+            check if that solves the issue.
+
+            Thank you for your contributions.
+
+
+      - name: Needs-more-information and waiting-for-reporter stale issues policy
+        uses: actions/stale@v9.0.0
+        with:
+          repo-token: ${{ github.token }}
+          only-labels: "needs-more-information,waiting-for-reporter"
+          days-before-stale: 21
+          days-before-close: 7
+          days-before-pr-stale: -1
+          days-before-pr-close: -1
+          operations-per-run: 250
+          remove-stale-when-updated: true
+          stale-issue-label: "stale"
+          exempt-issue-labels: "no-stale,help-wanted"
+          stale-issue-message: >
+            There hasn't been any activity on this issue recently and it has
+            been waiting for the reporter to provide information or an update.
+            This issue has been automatically marked as stale because of that.
+            It will be closed if no further activity occurs.
+
+            Please make sure to update to the latest python-kasa version and
+            check if that solves the issue.
+
+            Thank you for your contributions.