add boost mode option for installing

sphaira/include/yati/yati.hpp

@@ -71,6 +71,10 @@ enum : Result {
 struct Config {
     bool sd_card_install{};
 
+    // sets the performance mode to FastLoad which boosts the CPU clock
+    // and lowers the GPU clock.
+    bool boost_mode{};
+
     // enables downgrading patch / data patch (dlc) version.
     bool allow_downgrade{};