feat(design): adopt CIBG component patterns (header, forms, wizards, dashboard)

Re-skins the app's layout on top of the CIBG Huisstijl theme (previous commit) so it
matches designsystem.cibg.nl, not just its colour tokens — magenta ("robijn") header,
horizontal nav, and the CIBG component markup for forms/wizards/dashboard.

- Header: logo block + robijn titlebar (breadcrumb + user menu) + grey horizontal nav
  (4 links) replacing the dashboard side-nav; breadcrumb restyled for the titlebar
  (no background of its own — CIBG's global `header nav` rule otherwise bleeds a grey
  fill into it, fixed by scoping an override inside BreadcrumbComponent).
- Forms: form-field/radio-group/checkbox rebuilt on CIBG's horizontal `form-group row`
  / `form-check.styled` markup (label col-md-4, control col-md-8); same input() APIs.
- Wizards: stepper rebuilt as the CIBG "stappenindicator" (numbered circles, visited
  steps clickable for back-nav, title merged in); wizard-shell adopts the CIBG
  procesnavigatie button row. Back-navigation wired into all three wizard machines
  (registratie-wizard already had it; added `GaNaarStap` to intake/herregistratie
  machines, pure + spec'd).
- New shared/ui molecules: confirmation (animated bevestiging checkmark, replaces
  plain alerts on submit), review-section (controlestap sections with "Wijzigen"),
  application-list/application-link (CIBG "aanvragen" rows, replace the dashboard's
  card grid and aanvraag-block).
- Cleanup: delete side-nav and now-unused styles.scss utilities (.app-overview,
  .app-form-panel, .app-card-grid); correct design-tokens.mdx (it referenced tokens
  that no longer exist) and document the CIBG-value token bridge.

Verified: build/lint/check:tokens green, 178 tests pass (4 new GaNaarStap cases), and
manually driven end-to-end (dashboard, a full herregistratie submission through to the
confirmation screen, mobile width, keyboard focus).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/app/shared/layout/site-footer/site-footer.component.ts

@@ -8,7 +8,7 @@ import { Component } from '@angular/core';
   selector: 'app-site-footer',
   styles: [`
     :host{display:block}
-    .bar{background:var(--rhc-color-donkerblauw-700);color:var(--rhc-color-foreground-on-primary);margin-block-start:var(--rhc-space-max-5xl);inline-size:100%}
+    .bar{background:var(--rhc-color-layout);color:var(--rhc-color-foreground-on-primary);margin-block-start:var(--rhc-space-max-5xl);inline-size:100%}
     .inner{max-inline-size:var(--app-content-max);margin-inline:auto;padding:var(--rhc-space-max-3xl) var(--rhc-space-max-2xl);box-sizing:border-box;display:flex;gap:var(--rhc-space-max-3xl);flex-wrap:wrap;justify-content:space-between}
     .tagline{font-style:italic;font-weight:var(--rhc-text-font-weight-semi-bold);font-size:var(--rhc-text-font-size-lg);max-inline-size:18rem}
     .ministry{margin-block-start:var(--rhc-space-max-md);font-size:var(--rhc-text-font-size-sm);color:var(--rhc-color-foreground-on-primary)}
@@ -16,7 +16,7 @@ import { Component } from '@angular/core';
     .links{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--rhc-space-max-sm);font-size:var(--rhc-text-font-size-sm)}
     .links a{color:var(--rhc-color-foreground-on-primary);text-decoration:none}
     .links a:hover{text-decoration:underline}
-    .meta{inline-size:100%;border-block-start:var(--rhc-border-width-sm) solid var(--rhc-color-lintblauw-600);margin-block-start:var(--rhc-space-max-xl);padding-block-start:var(--rhc-space-max-lg);font-size:var(--rhc-text-font-size-sm);opacity:.85}
+    .meta{inline-size:100%;border-block-start:var(--rhc-border-width-sm) solid rgb(255 255 255 / 0.25);margin-block-start:var(--rhc-space-max-xl);padding-block-start:var(--rhc-space-max-lg);font-size:var(--rhc-text-font-size-sm);opacity:.85}
   `],
   template: `
     <footer class="bar">