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/.editorconfig

@@ -0,0 +1,15 @@
+# editorconfig.org
+root = true
+
+[*]
+charset = utf-8
+indent_size = 2
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+# Markdown syntax specifies that trailing whitespaces can be meaningful,
+# so let’s not trim those. e.g. 2 trailing spaces = linebreak (<br />)
+# See https://daringfireball.net/projects/markdown/syntax#p
+[*.md]
+trim_trailing_whitespace = false