🎉 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

.gitea/workflows/branch-cleanup.yml

@@ -0,0 +1,26 @@
+name: Branch Cleanup
+
+on:
+  workflow_call:
+
+jobs:
+  branch-cleanup:
+    runs-on: ubuntu-latest
+    if: gitea.event.pull_request.merged == true
+    steps:
+      - name: Delete merged branch
+        env:
+          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+        run: |
+          BRANCH="${{ gitea.event.pull_request.head.ref }}"
+
+          if [[ "$BRANCH" == "main" || "$BRANCH" == "master" || "$BRANCH" == "develop" ]]; then
+            echo "Branch protetto, skip: $BRANCH"
+            exit 0
+          fi
+
+          curl -s -X DELETE \
+            -H "Authorization: token $GITEA_TOKEN" \
+            "https://gitea.pzetatouch.it/api/v1/repos/${{ gitea.repository }}/branches/$(python3 -c "import urllib.parse; print(urllib.parse.quote('$BRANCH', safe=''))")"
+
+          echo "Branch eliminato: $BRANCH"