Clean up PR #224 upstream: address franky47 review feedback

[guillaumebadin]

Context

PR 47ng/actions-clever-cloud#224 received a review from @franky47 with changes requested. The upstream maintainer is willing to accept the core fix but not the BSG-specific changes.

Franky47's feedback summary

Core concern

He wants a cleaner justification for the unlink-before-link pattern — specifically why versioning .clever.json doesn't work in our case (monorepo with multiple .clever.json files).

Inline review comments

1. CLAUDE.md → Rename to AGENTS.md for cross-agent convention
2. package-lock.json → Delete it, the project uses pnpm only
3. action.yml + workflows (4 comments) → Revert all Docker registry references from beyond-scale-group back to 47ng. Quote: "If you want to use your own image registry, feel free to fork this repository, but I can't merge this as-is."

Action items

• Create a clean upstream PR on 47ng/actions-clever-cloud with ONLY the core fix (unlink-before-link in action.ts + tests), without any BSG-specific changes (no registry rename, no version bump, no CLAUDE.md)
• Add a clear PR description explaining the monorepo use case where .clever.json versioning doesn't work
• Delete package-lock.json from the upstream PR
• Keep all BSG-specific changes (registry, branding, CLAUDE.md) on our fork only
• Consider renaming CLAUDE.md to AGENTS.md on our fork as well (optional)

Reference

• Upstream PR: fix: Handle already-linked app in re-deploy scenarios 47ng/actions-clever-cloud#224
• Guillaume's reply: fix: Handle already-linked app in re-deploy scenarios 47ng/actions-clever-cloud#224 (comment)

[donna-bsg]

👀 Donna IA — prise en charge

Je prends ce ticket en revue cette nuit. Les action items sont clairs :

1. Créer une PR propre sur 47ng/actions-clever-cloud avec uniquement le fix core (unlink-before-link dans action.ts + tests)
2. Aucune référence BSG dans l'upstream PR (pas de registry rename, pas de version bump, pas de CLAUDE.md)
3. Supprimer package-lock.json du patch upstream
4. Garder les changements BSG-spécifiques sur le fork uniquement

Je vais analyser le diff du PR 47ng#224 et préparer la stratégie. Si le travail de code est validé par l'équipe, je peux lancer un coding agent pour implémenter la PR propre.

/cc @guillaumebadin