GH Action to tag and close stale issues (Chia-Network#7140)

* Create stale-issue.yml

Created initial Stale Issue/PR script config with the following configuration parameters:

Run the script every day at 4am PST (11am UTC)
Flag issues as stale after 14 days of no activity with stale-issue label.
Flag PRs as stale after 60 days of no activity with stale-pr label.
Close stale issues after a further 7 days of no activty.
Do NOT close stale PRs, only warn with comments.
Ignore stale status for any Issues or PRs with an assigned milestone, or an assignee.
Remove stable labels if they have been updated

This change will not be put into a PR for review until this entire flow has been tested on release-test first.

* Update stale-issue.yml

changing to main to incorporate some needed fixes

.github/workflows/stale-issue.yml

@@ -0,0 +1,26 @@
+name: 'Close stale issues'
+on:
+  schedule:
+    - cron: '0 11 * * *'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: chia-network/stale@main
+        with:
+          operations-per-run: 10000
+          ascending: true
+          days-before-issue-stale: 14
+          days-before-issue-close: 7
+          days-before-pr-stale: 60
+          days-before-pr-close: -1
+          exempt-all-pr-milestones: true
+          exempt-all-issue-milestones: true
+          exempt-all-assignees: true
+          stale-issue-label: stale-issue
+          stale-pr-label: stale-pr
+          remove-stale-when-updated: true
+          stale-issue-message: 'This issue has been flagged as stale as there has been no activity on it in 14 days. If this issue is still affecting you and in need of review, please update it to keep it open.'
+          close-issue-message: 'This issue was automatically closed because it has been flagged as stale and subsequently passed 7 days with no further activity.'
+          stale-pr-message: 'This PR has been flagged as stale due to no activity for over 60 days. It will not be automatically closed, but it has been given a stale-pr label and should be manually reviewed.'