Add PWM motor control and refactor engine update

Introduce ENA pins for both motors and implement rpmToPwm and setMotor.
Replace extensive Serial debug prints with concise motor‑drive logic in
Engine::update. Consolidate sonar pins into a single TRIG_AND_ECHO_PIN.
Update pinMode calls in the sketch to configure the new ENA pins.

Projekt_Arduino.ino

@@ -22,6 +22,10 @@ void setup() {
 
   pinMode(IN_1, OUTPUT);
   pinMode(IN_2, OUTPUT);
+  pinMode(ENA_1, OUTPUT);
+  pinMode(IN_3, OUTPUT);
+  pinMode(IN_4, OUTPUT);
+  pinMode(ENA_2, OUTPUT);
 
   rfid.begin();
   display.begin(LCD_COLS, LCD_ROWS);
@@ -38,7 +42,7 @@ void loop() {
     carEnabled = !carEnabled;
     Serial.print("Auto działa: ");
     Serial.println(carEnabled);
-    display.startOrEnd(carEnabled);0
+    display.startOrEnd(carEnabled);
   };
 
   if (carEnabled) {