Initial commit: notification-elements-demo app

Interactive Angular 19 demo for @sda/notification-elements-ui with
6 sections: Bell & Feed, Notification Center, Inbox, Comments &
Threads, Mention Input, and Full-Featured layout. Includes mock
data, dark mode toggle, and real-time event log.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

node_modules/@nodelib/fs.walk/out/settings.d.ts

@@ -0,0 +1,30 @@
+import * as fsScandir from '@nodelib/fs.scandir';
+import type { Entry, Errno } from './types';
+export declare type FilterFunction<T> = (value: T) => boolean;
+export declare type DeepFilterFunction = FilterFunction<Entry>;
+export declare type EntryFilterFunction = FilterFunction<Entry>;
+export declare type ErrorFilterFunction = FilterFunction<Errno>;
+export interface Options {
+    basePath?: string;
+    concurrency?: number;
+    deepFilter?: DeepFilterFunction;
+    entryFilter?: EntryFilterFunction;
+    errorFilter?: ErrorFilterFunction;
+    followSymbolicLinks?: boolean;
+    fs?: Partial<fsScandir.FileSystemAdapter>;
+    pathSegmentSeparator?: string;
+    stats?: boolean;
+    throwErrorOnBrokenSymbolicLink?: boolean;
+}
+export default class Settings {
+    private readonly _options;
+    readonly basePath?: string;
+    readonly concurrency: number;
+    readonly deepFilter: DeepFilterFunction | null;
+    readonly entryFilter: EntryFilterFunction | null;
+    readonly errorFilter: ErrorFilterFunction | null;
+    readonly pathSegmentSeparator: string;
+    readonly fsScandirSettings: fsScandir.Settings;
+    constructor(_options?: Options);
+    private _getValue;
+}