LibSQL+SQLServer+SQLStudio+sql: Send result rows over IPC as SQL::Value

We've been sending the values converted to a string, but now that the
Value type is transferrable over IPC, send the values themselves. Any
client that wants the value as a string may do so easily, whereas this
will allow less trivial clients to avoid string parsing.

Userland/Utilities/sql.cpp

@@ -85,7 +85,7 @@ public:
             }
         };
 
-        m_sql_client->on_next_result = [](auto, auto, auto const& row) {
+        m_sql_client->on_next_result = [](auto, auto, auto row) {
             StringBuilder builder;
             builder.join(", "sv, row);
             outln("{}", builder.build());