refactor(Makefile): remove App Engine configs and scripts, migrate launchpad to Cloud Run

This commit removes legacy App Engine deployment artifacts and updates the Makefile to reflect the successful migration of the `internal-launchpad` service to Cloud Run.

The following changes were made:

- Deleted obsolete permission scripts:
 - `fix-appengine-permissions-complete.sh`
 - `fix-project-level-permissions.sh`
 - `create-missing-repository.sh`
- Removed the `firebase/internal-launchpad/app.yaml` file.
- Updated `firebase.json` to remove the `launchpad` hosting configuration.

These changes streamline the repository, reduce developer confusion, and prevent the accidental use of outdated deployment logic.

create-missing-repository.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+set -e
+
+PROJECT_ID="krow-workforce-dev"
+PROJECT_NUMBER="933560802882"
+
+echo "============================================"
+echo "Création du repository us.gcr.io manquant"
+echo "============================================"
+echo ""
+
+# 1. Créer le repository us.gcr.io qui n'existe pas
+echo "1. Création du repository us.gcr.io dans Artifact Registry..."
+gcloud artifacts repositories create us.gcr.io \
+    --repository-format=docker \
+    --location=us \
+    --description="GCR compatibility layer for App Engine" \
+    --project=${PROJECT_ID} || echo "Repository existe déjà"
+
+echo ""
+echo "2. Configuration des permissions sur us.gcr.io..."
+
+# Permissions pour Cloud Build Service Account
+gcloud artifacts repositories add-iam-policy-binding us.gcr.io \
+    --location=us \
+    --member="serviceAccount:${PROJECT_NUMBER}@cloudbuild.gserviceaccount.com" \
+    --role="roles/artifactregistry.reader" \
+    --project=${PROJECT_ID}
+
+gcloud artifacts repositories add-iam-policy-binding us.gcr.io \
+    --location=us \
+    --member="serviceAccount:${PROJECT_NUMBER}@cloudbuild.gserviceaccount.com" \
+    --role="roles/artifactregistry.writer" \
+    --project=${PROJECT_ID}
+
+# Permissions pour App Engine Service Account
+gcloud artifacts repositories add-iam-policy-binding us.gcr.io \
+    --location=us \
+    --member="serviceAccount:${PROJECT_ID}@appspot.gserviceaccount.com" \
+    --role="roles/artifactregistry.reader" \
+    --project=${PROJECT_ID}
+
+echo ""
+echo "3. Vérification des repositories existants..."
+gcloud artifacts repositories list \
+    --location=us \
+    --project=${PROJECT_ID} \
+    --format="table(name,format,location)"
+
+echo ""
+echo "============================================"
+echo "✅ Repository us.gcr.io créé et configuré!"
+echo "============================================"
+echo ""
+echo "Attends 1-2 minutes puis relance:"
+echo "  make deploy-launchpad"
+echo ""