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/eslint-plugin-react/configs/all.js

@@ -0,0 +1,13 @@
+'use strict';
+
+const plugin = require('..');
+
+const legacyConfig = plugin.configs.all;
+
+module.exports = {
+  plugins: { react: plugin },
+  rules: legacyConfig.rules,
+  languageOptions: { parserOptions: legacyConfig.parserOptions },
+};
+
+Object.defineProperty(module.exports, 'languageOptions', { enumerable: false });