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These changes streamline the repository, reduce developer confusion, and prevent the accidental use of outdated deployment logic.

fix-project-level-permissions.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+set -e
+
+PROJECT_ID="krow-workforce-dev"
+PROJECT_NUMBER="933560802882"
+
+echo "============================================"
+echo "Permissions au niveau du PROJET"
+echo "============================================"
+echo ""
+
+echo "1. Artifact Registry Admin pour Cloud Build au niveau projet..."
+gcloud projects add-iam-policy-binding ${PROJECT_ID} \
+    --member="serviceAccount:${PROJECT_NUMBER}@cloudbuild.gserviceaccount.com" \
+    --role="roles/artifactregistry.admin" \
+    --condition=None
+
+echo ""
+echo "2. Storage Admin pour Cloud Build (pour staging bucket)..."
+gcloud projects add-iam-policy-binding ${PROJECT_ID} \
+    --member="serviceAccount:${PROJECT_NUMBER}@cloudbuild.gserviceaccount.com" \
+    --role="roles/storage.admin" \
+    --condition=None
+
+echo ""
+echo "3. Vérification des rôles du service account Cloud Build:"
+gcloud projects get-iam-policy ${PROJECT_ID} \
+    --flatten="bindings[].members" \
+    --filter="bindings.members:${PROJECT_NUMBER}@cloudbuild.gserviceaccount.com" \
+    --format="table(bindings.role)"
+
+echo ""
+echo "============================================"
+echo "✅ Permissions au niveau projet configurées!"
+echo "============================================"
+echo ""
+echo "Ces permissions sont plus larges mais devraient résoudre le problème."
+echo "Attends 2-3 minutes puis relance: make deploy-launchpad"
+echo ""