🎉 feat(ci): setup Gitea Actions riutilizzabili cross-repo

- Aggiunti 6 workflow condivisi in .gitea/workflows/ con trigger workflow_call
- Implementati: quality-gates, npm-publish, docker-release, auto-release, dependency-check, branch-cleanup
- Aggiunti esempi consumer per microservizio e libreria-npm (ci, release, maintenance)
- Allineato npm run lint:check su tutti i workflow
- Corretti GITEA_TOKEN, gitea.* context, GITHUB_REF/GITHUB_OUTPUT per compatibilità Gitea
- Rimosso needs: tra job reusable (Gitea bug #31900), path uses: con .gitea/workflows/

Fixes #1 @1d

examples/libreria-npm/maintenance.yml

@@ -0,0 +1,22 @@
+# Copia in: .gitea/workflows/maintenance.yml
+# Combina branch-cleanup (PR merge) e dependency-check (settimanale)
+
+name: Maintenance
+
+on:
+  pull_request:
+    types: [closed]
+  schedule:
+    - cron: '0 8 * * 1'
+  workflow_dispatch:
+
+jobs:
+  branch-cleanup:
+    if: gitea.event_name == 'pull_request' && gitea.event.pull_request.merged == true
+    uses: pzeta_touch/shared-actions/.gitea/workflows/branch-cleanup.yml@main
+    secrets: inherit
+
+  dependency-check:
+    if: gitea.event_name == 'schedule' || gitea.event_name == 'workflow_dispatch'
+    uses: pzeta_touch/shared-actions/.gitea/workflows/dependency-check.yml@main
+    secrets: inherit