feat(core-dsr): scaffold package + GDPR DSR interfaces and types

- Add pnpm turbo gen core-package dsr generator template and register
  dsr in CORE_PACKAGE_GENERATORS / choices list
- Run generator to produce packages/core-dsr/ shell
- Define IDataExport (Art. 15/20), IDataDelete (Art. 17),
  IDataRectify (Art. 16), IProcessingRestriction (Art. 18) interfaces
- Add UserDataBundle and DeletionCertificate types in dsr-types.ts
- Ship core-dsr/contexts/user-data.jsonld schema.org JSON-LD @context
- Wire @repo/core-dsr into transpilePackages (web-next)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web-next/next.config.mjs

@@ -10,6 +10,7 @@ const nextConfig = {
     "@repo/core-audit",
     "@repo/core-cms",
     "@repo/core-consent",
+    "@repo/core-dsr",
     "@repo/core-shared",
     "@repo/marketing-pages",
     "@repo/media",