Adding some tags to scene item components for the prefab tool

src/dawn/scene/components/physics/2d/BoxCollider.hpp

@@ -10,7 +10,9 @@
 namespace Dawn {
   class BoxCollider : public Collider2D {
     public:
+      // @optional
       glm::vec2 min = glm::vec2(-0.5f, -0.5f);
+      // @optional
       glm::vec2 max = glm::vec2( 0.5f,  0.5f);
 
       BoxCollider(SceneItem *item);

src/dawn/scene/components/physics/2d/CharacterController2D.hpp

@@ -12,7 +12,9 @@ namespace Dawn {
       void move(glm::vec2 distance);
       
     public:
+      // @optional
       glm::vec2 velocity;
+      // @optional
       float_t friction = 12.0f;
       
       CharacterController2D(SceneItem *i);