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/cacache/lib/content/rm.js

@@ -0,0 +1,18 @@
+'use strict'
+
+const fs = require('fs/promises')
+const contentPath = require('./path')
+const { hasContent } = require('./read')
+
+module.exports = rm
+
+async function rm (cache, integrity) {
+  const content = await hasContent(cache, integrity)
+  // ~pretty~ sure we can't end up with a content lacking sri, but be safe
+  if (content && content.sri) {
+    await fs.rm(contentPath(cache, content.sri), { recursive: true, force: true })
+    return true
+  } else {
+    return false
+  }
+}