Monitor, mark and close issues and PRs with github workflow

Signed-off-by: Fatih Türken <turkenf@gmail.com>

.github/workflows/stale.yml

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+name: Stale Issues and PRs
+on:
+  schedule:
+  # Process new stale issues once a day. Folks can use /fresh for a fast un-stale
+  # per the commands workflow. Run at 3:15 mostly as a somewhat unique time to
+  # help correlate any issues with this workflow.
+  - cron: '15 3 * * *'
+  workflow_dispatch: {}
+
+permissions:
+  issues: write
+  pull-requests: write
+
+jobs:
+  stale:
+    runs-on: ubuntu-22.04
+    steps:
+    - uses: actions/stale@28ca1036281a5e5922ead5184a1bbf96e5fc984e # v9
+      with:
+        # This action uses ~2 operations per stale issue per run to determine
+        # whether it's still stale. It also uses 2-3 operations to mark an issue
+        # stale or not. During steady state (no issues to mark stale, check, or
+        # close) we seem to use less than 10 operations with ~200 issues and PRs
+        # open.
+        #
+        # Our hourly rate-limit budget for all workflows that use GITHUB_TOKEN
+        # is 1,000 requests per the below docs.
+        # https://docs.github.com/en/rest/overview/resources-in-the-rest-api#requests-from-github-actions
+        operations-per-run: 100
+        # For issues: post a "warning" message after 360 days, then close if another 30 days pass without a response.
+        days-before-issue-stale: 360
+        days-before-issue-close: 30        
+        stale-issue-label: stale
+        exempt-issue-labels: exempt-from-stale
+        stale-issue-message: >
+          To encourage issues not to rot, we automatically mark those with 
+          no activity in the last 360 days as stale. It will be closed in 30
+          days if no further activity occurs. Leaving a comment
+          **starting with** `/fresh` will mark this issue as not stale.
+        close-issue-message: >
+          I'm closing this issue because we haven't heard back in 30 days. ⌛️
+          If you still need help, feel free to comment or reopen the issue!
+        # For PRs: post a "warning" message after 90 days, then close if another 14 days pass without a response.
+        days-before-pr-stale: 90
+        days-before-pr-close: 14
+        stale-pr-label: stale
+        exempt-pr-labels: exempt-from-stale
+        stale-pr-message: > 
+          To encourage PRs not to rot, we automatically mark those with 
+          no activity in the last 90 days as stale. It will be closed in 14
+          days if no further activity occurs. Leaving a comment
+          **starting with** `/fresh` will mark this PR as not stale.
+        close-pr-message: >
+          I'm closing this pull request because we haven't heard back in
+          90 days. ⌛️ If you're still working on this, feel free to reopen
+          the PR or create a new one!