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/prettier/plugins/postcss.d.ts

@@ -0,0 +1,11 @@
+import { Parser, Printer } from "../index.js";
+
+export declare const parsers: {
+  css: Parser;
+  less: Parser;
+  scss: Parser;
+};
+
+export declare const printers: {
+  postcss: Printer;
+};