feat(sso): [PM-8114] implement SSO component UI refresh

Consolidates existing SSO components into a single unified component in
libs/auth, matching the new design system. This implementation:

- Creates a new shared SsoComponent with extracted business logic
- Adds feature flag support for unauth-ui-refresh
- Updates page styling including new icons and typography
- Preserves web client claimed domain logic
- Maintains backwards compatibility with legacy views

PM-8114

---------

Co-authored-by: Jared Snider <116684653+JaredSnider-Bitwarden@users.noreply.github.com>
Co-authored-by: Jared Snider <jsnider@bitwarden.com>

libs/auth/src/angular/anon-layout/anon-layout.component.ts

@@ -34,6 +34,13 @@ export class AnonLayoutComponent implements OnInit, OnChanges {
   @Input() hideLogo: boolean = false;
   @Input() hideFooter: boolean = false;
 
+  /**
+   * Max width of the title area content
+   *
+   * @default null
+   */
+  @Input() titleAreaMaxWidth?: "md";
+
   /**
    * Max width of the layout content
    *
@@ -60,6 +67,7 @@ export class AnonLayoutComponent implements OnInit, OnChanges {
 
   async ngOnInit() {
     this.maxWidth = this.maxWidth ?? "md";
+    this.titleAreaMaxWidth = this.titleAreaMaxWidth ?? null;
     this.hostname = (await firstValueFrom(this.environmentService.environment$)).getHostname();
     this.version = await this.platformUtilsService.getApplicationVersion();