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/es-abstract/2022/UTF16EncodeCodePoint.js

@@ -0,0 +1,25 @@
+'use strict';
+
+var GetIntrinsic = require('get-intrinsic');
+
+var $TypeError = require('es-errors/type');
+var $fromCharCode = GetIntrinsic('%String.fromCharCode%');
+
+var floor = require('./floor');
+var modulo = require('./modulo');
+
+var isCodePoint = require('../helpers/isCodePoint');
+
+// https://262.ecma-international.org/12.0/#sec-utf16encoding
+
+module.exports = function UTF16EncodeCodePoint(cp) {
+	if (!isCodePoint(cp)) {
+		throw new $TypeError('Assertion failed: `cp` must be >= 0 and <= 0x10FFFF');
+	}
+	if (cp <= 65535) {
+		return $fromCharCode(cp);
+	}
+	var cu1 = $fromCharCode(floor((cp - 65536) / 1024) + 0xD800);
+	var cu2 = $fromCharCode(modulo(cp - 65536, 1024) + 0xDC00);
+	return cu1 + cu2;
+};