feat: added Direction enum

Author: ralvarezdev

enums.go

@@ -0,0 +1,27 @@
+package tinygo_servo
+
+type (
+	// Direction is an enum to represent the different servo directions for the vehicle.
+	Direction uint8
+)
+
+const (
+	DirectionNil Direction = iota
+	DirectionLeft
+	DirectionRight
+	DirectionStraight
+)
+
+// InvertedDirection returns the inverted direction.
+func (d Direction) InvertedDirection() Direction {
+	switch d {
+	case DirectionLeft:
+		return DirectionRight
+	case DirectionRight:
+		return DirectionLeft
+	case DirectionStraight:
+		return DirectionStraight
+	default:
+		return DirectionNil
+	}
+}

errors.go

@@ -17,4 +17,5 @@ const (
 	ErrorCodeServoAngleAboveMaxPulseWidth
 	ErrorCodeServoFailedToSetServoAngle
 	ErrorCodeServoNilHandler
-)
+	ErrorCodeServoUnknownDirection
+)