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/vocabularies/code.d.ts

@@ -0,0 +1,17 @@
+import type { SchemaMap } from "../types";
+import type { SchemaCxt } from "../compile";
+import type { KeywordCxt } from "../compile/validate";
+import { CodeGen, Code, Name } from "../compile/codegen";
+export declare function checkReportMissingProp(cxt: KeywordCxt, prop: string): void;
+export declare function checkMissingProp({ gen, data, it: { opts } }: KeywordCxt, properties: string[], missing: Name): Code;
+export declare function reportMissingProp(cxt: KeywordCxt, missing: Name): void;
+export declare function hasPropFunc(gen: CodeGen): Name;
+export declare function isOwnProperty(gen: CodeGen, data: Name, property: Name | string): Code;
+export declare function propertyInData(gen: CodeGen, data: Name, property: Name | string, ownProperties?: boolean): Code;
+export declare function noPropertyInData(gen: CodeGen, data: Name, property: Name | string, ownProperties?: boolean): Code;
+export declare function allSchemaProperties(schemaMap?: SchemaMap): string[];
+export declare function schemaProperties(it: SchemaCxt, schemaMap: SchemaMap): string[];
+export declare function callValidateCode({ schemaCode, data, it: { gen, topSchemaRef, schemaPath, errorPath }, it }: KeywordCxt, func: Code, context: Code, passSchema?: boolean): Code;
+export declare function usePattern({ gen, it: { opts } }: KeywordCxt, pattern: string): Name;
+export declare function validateArray(cxt: KeywordCxt): Name;
+export declare function validateUnion(cxt: KeywordCxt): void;