Remove turn signal & sonar, add RFID auth

Define AUTH_UID and AUTH_UID_SIZE constants.
Introduce motor control pins IN_1‑IN_4 and set them as outputs.
Comment out turn‑signal and sonar pin definitions and related code.
Refactor Display to remove updateDirection functionality.
Extend RFIDReader with reset() and matches() methods; use them to toggle
carEnabled based on RFID authentication.
Update the main loop to operate only when the RFID tag matches the
authorized UID.

Config.h

@@ -4,13 +4,16 @@
 const int SS_PIN = 10;
 const int RST_PIN = 7;
 
-// Kierunkowskazy
-const int TS_RIGHT = 9;
-const int TS_LEFT = 8;
+const byte AUTH_UID[4] = {145, 136, 97, 102};
+const byte AUTH_UID_SIZE = sizeof(AUTH_UID);
 
-// Odległościomierz
-const int TRIG_PIN = 6;
-const int ECHO_PIN = 5;
+// // Kierunkowskazy
+// const int TS_RIGHT = 9;
+// const int TS_LEFT = 8;
+
+// // Odległościomierz
+// const int TRIG_PIN = 6;
+// const int ECHO_PIN = 5;
 
 const long SONAR_MAX_DIST_CM = 400;
 
@@ -25,7 +28,13 @@ const int GEAR_THRESH_HIGH = 682;
 const int LCD_COLS = 16;
 const int LCD_ROWS = 2;
 
-// Silnik
+// Skrzynia biegów
 const uint8_t CLUTCH_PIN = A7;
 const uint8_t BRAKE_PIN = A2;
 const uint8_t THROTTLE_PIN = A3;
+
+// Silniki
+const int IN_1 = 9;
+const int IN_2 = 8;
+const int IN_3 = 4;
+const int IN_4 = 3;