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/rxjs/src/internal/scheduler/intervalProvider.ts

@@ -0,0 +1,31 @@
+import type { TimerHandle } from './timerHandle';
+type SetIntervalFunction = (handler: () => void, timeout?: number, ...args: any[]) => TimerHandle;
+type ClearIntervalFunction = (handle: TimerHandle) => void;
+
+interface IntervalProvider {
+  setInterval: SetIntervalFunction;
+  clearInterval: ClearIntervalFunction;
+  delegate:
+    | {
+        setInterval: SetIntervalFunction;
+        clearInterval: ClearIntervalFunction;
+      }
+    | undefined;
+}
+
+export const intervalProvider: IntervalProvider = {
+  // When accessing the delegate, use the variable rather than `this` so that
+  // the functions can be called without being bound to the provider.
+  setInterval(handler: () => void, timeout?: number, ...args) {
+    const { delegate } = intervalProvider;
+    if (delegate?.setInterval) {
+      return delegate.setInterval(handler, timeout, ...args);
+    }
+    return setInterval(handler, timeout, ...args);
+  },
+  clearInterval(handle) {
+    const { delegate } = intervalProvider;
+    return (delegate?.clearInterval || clearInterval)(handle as any);
+  },
+  delegate: undefined,
+};