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/prismjs/plugins/download-button/prism-download-button.js

@@ -0,0 +1,20 @@
+(function () {
+
+	if (typeof Prism === 'undefined' || typeof document === 'undefined' || !document.querySelector) {
+		return;
+	}
+
+	Prism.plugins.toolbar.registerButton('download-file', function (env) {
+		var pre = env.element.parentNode;
+		if (!pre || !/pre/i.test(pre.nodeName) || !pre.hasAttribute('data-src') || !pre.hasAttribute('data-download-link')) {
+			return;
+		}
+		var src = pre.getAttribute('data-src');
+		var a = document.createElement('a');
+		a.textContent = pre.getAttribute('data-download-link-label') || 'Download';
+		a.setAttribute('download', '');
+		a.href = src;
+		return a;
+	});
+
+}());