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/@schematics/angular/config/schema.d.ts

@@ -0,0 +1,22 @@
+/**
+ * Generates configuration files for your project. These files control various aspects of
+ * your project's build process, testing, and browser compatibility. This schematic helps
+ * you create or update essential configuration files with ease.
+ */
+export type Schema = {
+    /**
+     * The name of the project where the configuration file should be created or updated.
+     */
+    project: string;
+    /**
+     * Specifies the type of configuration file to generate.
+     */
+    type: Type;
+};
+/**
+ * Specifies the type of configuration file to generate.
+ */
+export declare enum Type {
+    Browserslist = "browserslist",
+    Karma = "karma"
+}