Add Apps to control GitHub issues (#17807)

.github/issue-close.yml

@@ -0,0 +1,17 @@
+# Config for Close Issue app: https://probot.github.io/apps/close-issue/
+
+# Comment that will be sent if an issue is judged to be closed
+comment: "This issue was closed because it does not use any of our issue templates. Please make sure to use one of the suggested templates."
+issueConfigs:
+# There can be several configs for different kind of issues.
+- content:
+# Bug report
+  - "Steps to reproduce"
+  - "Expected behavior"
+  - "Actual behavior"
+  - "Version of Rocket.Chat Server"
+- content:
+# Release issue
+  - "Before Release - Preparation"
+# The issue is considered to be valid if it includes all keywords from any of these two configs.
+# Or it will be closed by the app.

.github/workflows/stale.yml

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+name: Stale Questions
+
+on:
+  schedule:
+  - cron: "0 0 * * *"
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/stale@v2
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        days-before-stale: 10
+        days-before-close: 4
+        only-labels: 'stat: need more info'
+        stale-issue-message: >-
+          This issue has been marked as stale because there has been
+          no further activity in the last 10 days. If the issue remains
+          stale for the next 4 days (a total of two weeks with no activity),
+          then it will be assumed that the question has been resolved and
+          the issue will be automatically closed.
+        stale-issue-label: 'stat: no response'
+
+    - uses: actions/stale@v2
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        days-before-stale: 60
+        days-before-close: 7
+        exempt-issue-labels: 'Epic,Feature: Planned,sla,sponsored,stat: waiting PR merge,Triaged,subj: security'
+        stale-issue-message: >-
+          This issue has been automatically marked as stale because it has not had
+          recent activity. It will be closed if no further activity occurs. Thank you
+          for your contributions.
+        stale-issue-label: 'stat: stale'