chore(project): stalebot integration (#3019)

* chore(project): stalebot integration

* chore(project): put file in correct directory

.github/stale.yml

@@ -0,0 +1,53 @@
+# Config for Stalebot, limited to only `issues`
+only: issues
+
+# Issues config
+issues:
+  daysUntilStale: 60
+  daysUntilClose: 7
+
+  # Limit the number of actions per hour, from 1-30. Default is 30
+  limitPerRun: 30
+
+  # Issues with these labels will never be considered stale
+  exemptLabels:
+    - kind/enhancement
+    - kind/feature
+    - kind/question
+    - bug/need-confirmation
+    - bug/confirmed
+    - status/discuss
+  
+  # Only issues with all of these labels are checked if stale. Defaults to `[]` (disabled)
+  onlyLabels: []
+
+  # Set to true to ignore issues in a project (defaults to false)
+  exemptProjects: true
+  # Set to true to ignore issues in a milestone (defaults to false)
+  exemptMilestones: true
+  # Set to true to ignore issues with an assignee (defaults to false)
+  exemptAssignees: true
+
+  # Label to use when marking an issue as stale
+  staleLabel: status/stale
+
+  # Comment to post when marking an issue as stale. Set to `false` to disable
+  markComment: >
+    This issue has been marked as stale as it has not had recent activity, 
+    it will be closed if no further activity occurs in the next 7 days.
+    If you believe that it has been incorrectly labelled as stale, 
+    leave a comment and the label will be removed.
+
+  # Comment to post when removing the stale label.
+  # unmarkComment: >
+  #   Your comment here.
+
+  # Comment to post when closing a stale issue. Set to `false` to disable
+  closeComment: >
+    Since no further activity has appeared on this issue it will be closed.
+    If you believe that it has been incorrectly closed, leave a comment
+    and mention @itsconquest. One of our staff will then review the issue.
+    
+    Note - If it is an old bug report, make sure that it is reproduceable in the
+    latest version of Portainer as it may have already been fixed.
+