ci: replace stale bot with action (#6015)

* ci: replace stale bot with action

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* run on pr to test?

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* don't run on PRs

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* remove debug

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

---------

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

.github/workflows/repo-stale.yml

@@ -0,0 +1,33 @@
+name: 'authentik-repo-stale'
+
+on:
+  schedule:
+    - cron: '30 1 * * *'
+  workflow_dispatch:
+
+permissions:
+  issues: write
+  pull-requests: write
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - id: generate_token
+        uses: tibdex/github-app-token@v1
+        with:
+          app_id: ${{ secrets.GH_APP_ID }}
+          private_key: ${{ secrets.GH_APP_PRIVATE_KEY }}
+      - uses: actions/stale@v8
+        with:
+          repo-token: ${{ steps.generate_token.outputs.token }}
+          days-before-stale: 60
+          days-before-close: 7
+          exempt-issue-labels: pinned,security,pr_wanted,enhancement,bug/confirmed,enhancement/confirmed,question
+          stale-issue-label: wontfix
+          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.
+          # Don't stale PRs, so only apply to PRs with a non-existent label
+          only-pr-labels: foo