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/lib/vocabularies/draft2020.ts

@@ -0,0 +1,23 @@
+import type {Vocabulary} from "../types"
+import coreVocabulary from "./core"
+import validationVocabulary from "./validation"
+import getApplicatorVocabulary from "./applicator"
+import dynamicVocabulary from "./dynamic"
+import nextVocabulary from "./next"
+import unevaluatedVocabulary from "./unevaluated"
+import formatVocabulary from "./format"
+import {metadataVocabulary, contentVocabulary} from "./metadata"
+
+const draft2020Vocabularies: Vocabulary[] = [
+  dynamicVocabulary,
+  coreVocabulary,
+  validationVocabulary,
+  getApplicatorVocabulary(true),
+  formatVocabulary,
+  metadataVocabulary,
+  contentVocabulary,
+  nextVocabulary,
+  unevaluatedVocabulary,
+]
+
+export default draft2020Vocabularies