Initial scaffold: Shopify recesso (withdrawal) compliance app

- Remix (TypeScript) + Polaris, official Shopify app template
- Prisma multi-tenant schema (Settings, ExclusionRule, WithdrawalRequest, AuditLog, WebhookEvent) on Postgres
- Mandatory GDPR compliance webhooks (data_request, redact, shop/redact) + HMAC handlers
- API version pinned 2026-04, scopes read_orders/read_products
- Fly deploy config; two-env strategy (custom now, public later)
- Dev setup: shopify.web.toml + Vite allowedHosts for tunnels
- Docs: PLAN.md, ANALISI-REQUISITI-LEGALI.md (Art. 54-bis compliance)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Mv83a29B4eFv5ixoj6PoE1

app/shopify.web.toml.liquid

@@ -0,0 +1,11 @@
+name = "remix"
+roles = ["frontend", "backend"]
+webhooks_path = "/webhooks/app/uninstalled"
+
+{%- assign exec = dependency_manager | append: ' exec' -%}
+{%- if dependency_manager == 'yarn' -%}
+{%- assign exec = 'yarn' -%}
+{%- endif %}
+[commands]
+predev = "{{ exec }} prisma generate"
+dev = "{{ exec }} prisma migrate deploy && {{ exec }} remix vite:dev"