[FEAT] Modello Organizzativo SGSI (ISO 27001/27017/27018) + SoA pre-popolato da NIS2

Nuovo modulo guidato in 6 step (cl. 4-10 + Statement of Applicability):
- migration 037 (isms_models/roles/soa/documents) + 038 (dataset 111 controlli:
  93 Annex A:2022 + 7 CLD/27017 + 11 PII/27018) + runner scripts/migrate-isms.php
- IsmsModelController (16 endpoint) registrato in index.php
- SoA pre-popolato dalle risposte Gap Analysis NIS2 (mapping iso27001_control)
- estensioni cloud condizionali 27017/27018 via flag uses_public_cloud/
  is_cloud_provider/processes_pii_in_cloud
- AIService::generateIsmsDocument + fonti ISO in nis2_sources.php
- frontend isms.html/isms.js + api client + sidebar + help + i18n IT/EN
- ingest KB ISO (scope SYSTEM, solo titoli/sintesi: no testo coperto da copyright)
- version.json 1.14.0; doc studio + deploy handoff

Strumento di supporto/pre-audit (non certificazione). Migration DA APPLICARE su host.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

public/js/common.js

@@ -189,6 +189,7 @@ function loadSidebar() {
                 { name: 'Compliance Journey', href: 'workflow.html',   icon: `<svg viewBox="0 0 20 20" fill="currentColor"><path d="M10.707 2.293a1 1 0 00-1.414 0l-7 7a1 1 0 001.414 1.414L4 10.414V17a1 1 0 001 1h2a1 1 0 001-1v-2a1 1 0 011-1h2a1 1 0 011 1v2a1 1 0 001 1h2a1 1 0 001-1v-6.586l.293.293a1 1 0 001.414-1.414l-7-7z"/></svg>` },
                 { name: 'Gap Analysis',       href: 'assessment.html', icon: iconClipboardCheck(), i18nKey: 'nav.gap_analysis' },
                 { name: 'Gap Analysis ACN',   href: 'acn-gap.html',    icon: iconClipboardCheck(), i18nKey: 'nav.acn_gap' },
+                { name: 'Modello SGSI (ISO 27001)', href: 'isms.html', icon: `<svg viewBox="0 0 20 20" fill="currentColor"><path fill-rule="evenodd" d="M2.166 4.999A11.954 11.954 0 0010 1.944 11.954 11.954 0 0017.834 5c.11.65.166 1.32.166 2.001 0 5.225-3.34 9.67-8 11.317C5.34 16.67 2 12.225 2 7c0-.682.057-1.35.166-2.001zm11.541 3.708a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z" clip-rule="evenodd"/></svg>`, i18nKey: 'nav.isms' },
             ]
         },
         {