chore: update workflows (#531)

* chore: add stalebot in dryrun

 built from commit afadf53f7f
 dated 2026-04-02 13:13:19 +0200
 by Stéphane Lesimple (speed47_github@speed47.net)

* Merge branch 'test' into source

 built from commit 952fe6a87f
 dated 2026-04-02 18:40:05 +0200
 by Stéphane Lesimple (speed47_github@speed47.net)

* Merge pull request #530 from speed47/test

 built from commit d3c0f1a24d
 dated 2026-04-02 16:49:41 +0000
 by Stéphane Lesimple (speed47_github@speed47.net)

 chore: workflows revamp

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

.github/workflows/stale.yml

@@ -3,6 +3,16 @@ name: 'Manage stale issues and PRs'
 on:
   schedule:
     - cron: '37 7 * * *'
+  workflow_dispatch:
+    inputs:
+      action:
+        description: "dry-run"
+        required: true
+        default: "dryrun"
+        type: choice
+        options:
+          - dryrun
+          - apply
 
 permissions:
   issues: write
@@ -20,4 +30,4 @@ jobs:
           days-before-close: 7
           stale-issue-label: stale
           remove-stale-when-updated: true
-          debug-only: true
+          debug-only: ${{ case(inputs.action == 'apply', false, true) }}