Initial commit: Aeroflot Flights Web - Angular 12 baseline

- Angular 12 application with PrimeNG components
- 5 existing Cypress e2e test suites
- SCSS styling with BEM naming convention
- i18n support (10 languages)
- Leaflet map integration
- Complete component hierarchy and routing structure

This baseline will be used for Angular → React migration.

ClientApp/node_modules/sass/sass.node.js

@@ -0,0 +1,12 @@
+require('./sass.dart.js');
+const library = globalThis._cliPkgExports.pop();
+if (globalThis._cliPkgExports.length === 0) delete globalThis._cliPkgExports;
+library.load({
+  util: require("util"),
+  stream: require("stream"),
+  nodeModule: require("module"),
+  fs: require("fs"),
+  immutable: require("immutable"),
+});
+
+module.exports = library;