fix(norm): remove usage of friend

ex03/Point.cpp

@@ -13,12 +13,15 @@ Point &Point::operator=(const Point &other) {
 };
 Point::~Point() {}
 
+Fixed Point::getX() const { return x; }
+Fixed Point::getY() const { return y; }
+
 Fixed Point::triangleArea(Point const &a, Point const &b, Point const &c) {
   return (((a.x * (b.y - c.y)) + (b.x * (c.y - a.y)) + (c.x * (a.y - b.y))) / 2)
       .abs();
 }
 
 std::ostream &operator<<(std::ostream &stream, const Point &p) {
-  stream << "(" << p.x << ", " << p.y << ")";
+  stream << "(" << p.getX() << ", " << p.getY() << ")";
   return stream;
 }