add is link checker

bin/main.cpp

@@ -19,6 +19,7 @@
 #include "security/validate_email.hpp"
 #include "security/uuid.hpp"
 #include "security/is_string.hpp"
+#include "security/is_link.hpp"
 
 // for example
 int f(int a)
@@ -298,4 +299,14 @@ int main(int argc, char *argv[])
     query = hack::utils::make_query("super_function", 1, 123.3f, js);
     hack::log()("query", query);
   }
+
+  {// ex: is link
+    std::string link { "https://google.com" };
+    if (hack::security::is_link(link))
+      hack::log()("is link");
+
+    link = "https//google.com";
+    if (!hack::security::is_link(link))
+      hack::error()("no link");
+  }
 }