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/ajv/dist/compile/rules.d.ts

@@ -0,0 +1,28 @@
+import type { AddedKeywordDefinition } from "../types";
+declare const _jsonTypes: readonly ["string", "number", "integer", "boolean", "null", "object", "array"];
+export type JSONType = (typeof _jsonTypes)[number];
+export declare function isJSONType(x: unknown): x is JSONType;
+type ValidationTypes = {
+    [K in JSONType]: boolean | RuleGroup | undefined;
+};
+export interface ValidationRules {
+    rules: RuleGroup[];
+    post: RuleGroup;
+    all: {
+        [Key in string]?: boolean | Rule;
+    };
+    keywords: {
+        [Key in string]?: boolean;
+    };
+    types: ValidationTypes;
+}
+export interface RuleGroup {
+    type?: JSONType;
+    rules: Rule[];
+}
+export interface Rule {
+    keyword: string;
+    definition: AddedKeywordDefinition;
+}
+export declare function getRules(): ValidationRules;
+export {};