Step 2 (i18n): $localize sweep + JA_NEE dedup (M3, M4)

Wrap every user-facing Dutch string in Angular's first-party i18n — `i18n`/
`i18n-<attr>` in templates, `$localize` in TS (value-objects, machines, commands,
label constants, shared-component defaults). Source locale stays nl; a second
locale is now a translation file, not a code change.

- M3: ~145 strings localized with stable @@ ids across registratie,
  herregistratie, auth, shared/ui, shared/layout. Skipped: showcase, debug-state,
  scenario interceptor, generated client, specs/stories, raw status enum tags,
  internal parse* diagnostics.
- M4: single shared JA_NEE (localized labels) in radio-group; both wizard copies
  removed.

Gate green: lint, check:tokens, build, test 77/77.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/registratie/domain/change-request.machine.ts

@@ -40,7 +40,7 @@ function validate(draft: Draft): Result<Errors, Valid> {
   const straat = draft.straat.trim();
   const postcode = parsePostcode(draft.postcode);
   const errors: Errors = {};
-  if (!straat) errors.straat = 'Vul straat en huisnummer in.';
+  if (!straat) errors.straat = $localize`:@@validation.straat:Vul straat en huisnummer in.`;
   if (!postcode.ok) errors.postcode = postcode.error;
   if (straat && postcode.ok) {
     return { ok: true, value: { straat, postcode: postcode.value, woonplaats: draft.woonplaats.trim() } };