Add comprehensive library expansion with new components and demos

- Add new libraries: ui-accessibility, ui-animations, ui-backgrounds, ui-code-display, ui-data-utils, ui-font-manager, hcl-studio
- Add extensive layout components: gallery-grid, infinite-scroll-container, kanban-board, masonry, split-view, sticky-layout
- Add comprehensive demo components for all new features
- Update project configuration and dependencies
- Expand component exports and routing structure
- Add UI landing pages planning document

🤖 Generated with [Claude Code](https://claude.ai/code)

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

projects/ui-code-display/node_modules/@angular/common/xhr.d-D_1kTQR5.d.ts

@@ -0,0 +1,16 @@
+/**
+ * @license Angular v19.2.14
+ * (c) 2010-2025 Google LLC. https://angular.io/
+ * License: MIT
+ */
+
+/**
+ * A wrapper around the `XMLHttpRequest` constructor.
+ *
+ * @publicApi
+ */
+declare abstract class XhrFactory {
+    abstract build(): XMLHttpRequest;
+}
+
+export { XhrFactory };