style: format frontend, docs and skills with prettier; add .prettierignore

One-time prettier --write so the new format:check CI gate starts green.
.prettierignore excludes generated (api-client.ts, documentation.json),
vendored (public/cibg-huisstijl), and backend (dotnet format owns it).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/app/shared/ui/alert/alert.component.ts

@@ -16,7 +16,14 @@ const ICON_LABELS: Record<AlertType, string> = {
     only the icon's a11y label and a content wrapper (`.feedback` is a flex row). */
 @Component({
   selector: 'app-alert',
-  styles: [`.feedback>div{flex:1 1 auto;min-width:0}`],
+  styles: [
+    `
+      .feedback > div {
+        flex: 1 1 auto;
+        min-width: 0;
+      }
+    `,
+  ],
   template: `
     <div
       class="feedback"
@@ -25,8 +32,11 @@ const ICON_LABELS: Record<AlertType, string> = {
       [class.feedback-warning]="type() === 'warning'"
       [class.feedback-error]="type() === 'error'"
       role="status"
-      aria-atomic="true">
-      <span class="icon"><span class="visually-hidden">{{ iconLabels[type()] }}</span></span>
+      aria-atomic="true"
+    >
+      <span class="icon"
+        ><span class="visually-hidden">{{ iconLabels[type()] }}</span></span
+      >
       <div><ng-content /></div>
     </div>
   `,