close-stale: add workflow to close stale issues/pull_requests

Add workflow to close stale issues/pull_requests.

Workflow will first mark issue or pull_request as stale if there was
no activity for 60 days, and close it after the next 14 days if no
action is taken.

Signed-off-by: Mateusz Redzynia <mateuszx.redzynia@intel.com>

Author: redzynix

.github/workflows/close-stale.yml

@@ -0,0 +1,35 @@
+name: "Close stale pull requests/issues"
+on:
+  schedule:
+    - cron: "30 1 * * *"
+
+permissions:
+  contents: read
+
+jobs:
+  stale:
+    name: Find stale issues and PRs
+    runs-on: ubuntu-24.04
+    if: github.repository == 'thesofproject/sof'
+    permissions:
+      pull-requests: write
+      issues: write
+
+    steps:
+    - uses: actions/stale@5bef64f19d7facfb25b37b414482c7164d639639 #v9.1.0
+      with:
+        stale-pr-message: 'This pull request has been marked as stale because it has been open (more
+          than) 60 days with no activity. Remove the stale label or add a comment saying that you
+          would like to have the label removed otherwise this pull request will automatically be
+          closed in 14 days. Note, that you can always re-open a closed pull request at any time.'
+        stale-issue-message: 'This issue has been marked as stale because it has been open (more
+          than) 60 days with no activity. Remove the stale label or add a comment saying that you
+          would like to have the label removed otherwise this issue will automatically be closed in
+          14 days. Note, that you can always re-open a closed issue at any time.'
+        days-before-stale: 60
+        days-before-close: 14
+        stale-issue-label: 'stale'
+        stale-pr-label: 'stale'
+        exempt-pr-labels: 'blocked,in progress'
+        exempt-issue-labels: 'blocked,in progress'
+        operations-per-run: 400