fix: 🐛 Fix usage of unintialized fields

This should fix the data aborts that would occur when running the code. Previously the code would access fields in Gamepad that were uninitialized, leading to the code crashing.

include/gamepad/gamepad.hpp

@@ -119,16 +119,16 @@ class Gamepad {
 
         void updateScreens();
 
-        std::shared_ptr<DefaultScreen> defaultScreen;
-        std::vector<std::shared_ptr<AbstractScreen>> screens;
-        ScreenBuffer currentScreen;
-        ScreenBuffer nextBuffer;
+        std::shared_ptr<DefaultScreen> defaultScreen = std::make_shared<DefaultScreen>();
+        std::vector<std::shared_ptr<AbstractScreen>> screens{};
+        ScreenBuffer currentScreen{};
+        ScreenBuffer nextBuffer{};
         pros::Controller controller;
 
         uint8_t last_printed_line = 0;
         uint last_print_time = 0;
         uint last_update_time = 0;
-        pros::Mutex mut;
+        pros::Mutex mut{};
 };
 
 inline Gamepad Gamepad::master {pros::E_CONTROLLER_MASTER};