feat: Introduce fe modular build system

fe-app-podkop/src/validators/validateDomain.ts

@@ -0,0 +1,21 @@
+import { ValidationResult } from './types.js';
+
+export function validateDomain(domain: string): ValidationResult {
+  const domainRegex =
+    /^(?=.{1,253}(?:\/|$))(?:(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)\.)+(?:[a-zA-Z]{2,}|xn--[a-zA-Z0-9-]{1,59}[a-zA-Z0-9])(?:\/[^\s]*)?$/;
+
+  if (!domainRegex.test(domain)) {
+    return { valid: false, message: 'Invalid domain address' };
+  }
+
+  const hostname = domain.split('/')[0];
+  const parts = hostname.split('.');
+
+  const atLeastOneInvalidPart = parts.some((part) => part.length > 63);
+
+  if (atLeastOneInvalidPart) {
+    return { valid: false, message: 'Invalid domain address' };
+  }
+
+  return { valid: true, message: 'Valid' };
+}