Enable admin@localhost as eMail for admin purpose

Author: FalkWolsky

client/packages/lowcoder/src/util/stringUtils.ts

@@ -84,7 +84,7 @@ export const checkPhoneValid = (value: string): boolean => {
 };
 
 export const checkEmailValid = (value: string): boolean => {
-  return EMAIL_PATTERN.test(value);
+  return value === "admin@localhost" || EMAIL_PATTERN.test(value);
 };
 
 export const getNextEntityName = (