feat(joystick/vector): Update to return const ref where possible

components/joystick/include/joystick.hpp

@@ -203,7 +203,7 @@ class Joystick : public BaseComponent {
    * @brief Get the most recently updated calibrated position.
    * @return The most recent position (from when update() was last called).
    */
-  espp::Vector2f position() const;
+  const espp::Vector2f &position() const;
 
   /**
    * @brief Get the most recently updated raw / uncalibrated readings. This
@@ -213,7 +213,7 @@ class Joystick : public BaseComponent {
    * @return The most recent raw measurements (from when update() was last
    *         called).
    */
-  espp::Vector2f raw() const;
+  const espp::Vector2f &raw() const;
 
   friend struct fmt::formatter<Joystick>;
 

components/joystick/src/joystick.cpp

@@ -74,9 +74,9 @@ float espp::Joystick::x() const { return position_.x(); }
 
 float espp::Joystick::y() const { return position_.y(); }
 
-espp::Vector2f espp::Joystick::position() const { return position_; }
+const espp::Vector2f &espp::Joystick::position() const { return position_; }
 
-espp::Vector2f espp::Joystick::raw() const { return raw_; }
+const espp::Vector2f &espp::Joystick::raw() const { return raw_; }
 
 void espp::Joystick::recalculate(float raw_x, float raw_y) {
   raw_.x(raw_x);

components/math/include/vector2d.hpp

@@ -76,7 +76,7 @@ template <typename T> class Vector2d {
    * @brief Getter for the x value.
    * @return The current x value.
    */
-  T x() const { return x_; }
+  const T &x() const { return x_; }
 
   /**
    * @brief Setter for the x value.