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/license-webpack-plugin/README.md

@@ -0,0 +1,45 @@
+# License Webpack Plugin
+
+[![Build Status](https://api.travis-ci.org/xz64/license-webpack-plugin.svg?branch=master)](https://travis-ci.org/xz64/license-webpack-plugin)
+
+Manage third-party license compliance in your webpack build.
+
+## Installation
+`npm install license-webpack-plugin --save-dev`
+
+## Usage
+
+To use the plugin, simply add it to the plugins section in the webpack config.
+
+Example:
+```javascript
+const LicenseWebpackPlugin = require('license-webpack-plugin').LicenseWebpackPlugin;
+
+module.exports = {
+  plugins: [
+    new LicenseWebpackPlugin()
+  ]
+};
+```
+
+The default behavior will add a license notice file to each chunk of the webpack build. In addition, it will add a banner indicating the path to the license notice file in any Javascript assets. Third party libraries imported via external tools like SASS `@import` may not appear in the output (since webpack does not process `@import`). If this issue happens, please specify additional modules that the plugin should scan.
+
+To configure the plugin, check the [documentation](DOCUMENTATION.md).
+
+## Build Instructions
+
+```
+yarn
+yarn build
+```
+
+## Migration Guides
+
+Migration guides for breaking changes are documented [here](MIGRATION.md).
+
+## Changelog
+
+The changelog can be found [here](CHANGELOG.md).
+
+## License
+[ISC](https://opensource.org/licenses/ISC)