Created add link form

lib/constants/regexp.dart

@@ -1,6 +1,8 @@
 class Regexps {
   static final url =
       RegExp(r'/https?:\/\/(?:www\.)?([-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}\b)*(\/[\/\d\w\.-]*)*(?:[\?])*(.+)*/gi');
+  static final urlWithoutProtocol =
+      RegExp(r'[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)');
   static final ipAddress = RegExp(r'^((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)(\.(?!$)|$)){4}$');
   static final domain = RegExp(r'^(([a-z0-9|-]+\.)*[a-z0-9|-]+\.[a-z]+)$');
 }