Add registratie wizard, BFF dashboard-view, contracts/value-objects, and architecture docs

Checkpoint of in-progress work: the registration wizard (address prefill,
DUO diploma lookup, policy questions), decision-DTO contracts, parse-don't-
validate value objects, infrastructure adapters, plus CLAUDE.md and the
architecture/ADR docs.

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

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

@@ -3,13 +3,18 @@ import { Component } from '@angular/core';
 /** Organism: site footer. */
 @Component({
   selector: 'app-site-footer',
-  styles: [':host{display:block}'],
+  styles: [`
+    :host{display:block}
+    .bar{background:var(--rhc-color-donkerblauw-700);color:var(--rhc-color-wit);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-2xl);display:flex;gap:var(--rhc-space-max-3xl);flex-wrap:wrap;box-sizing:border-box}
+    .end{margin-inline-start:auto}
+  `],
   template: `
-    <footer class="utrecht-page-footer" style="background:var(--rhc-color-lintblauw-900,#01689b);color:#fff;margin-top:3rem;width:100%">
-      <div style="max-width:var(--app-content-max);margin:0 auto;padding:1.5rem;display:flex;gap:2rem;flex-wrap:wrap;box-sizing:border-box">
+    <footer class="utrecht-page-footer bar">
+      <div class="inner">
         <span>BIG-register</span>
         <span>CIBG — Ministerie van Volksgezondheid, Welzijn en Sport</span>
-        <span style="margin-left:auto;opacity:0.85">Demo / POC — geen echte gegevens</span>
+        <span class="end">Demo / POC — geen echte gegevens</span>
       </div>
     </footer>
   `,