feat: added collision world to canvas engine class

src/core/canvas_engine.cpp

@@ -132,6 +132,7 @@ void CanvasEngine::process_event(SDL_Event const &evt) {
 
 void CanvasEngine::tick(double delta_time) {
     this->level->propagate_tick(delta_time);
+    this->physics_world.check_collisions();
 }
 
 void CanvasEngine::draw(SDL_Renderer *render) {

src/core/canvas_engine.hpp

@@ -1,6 +1,7 @@
 #ifndef CANVAS_ENGINE_HPP
 #define CANVAS_ENGINE_HPP
 
+#include "core/collision.hpp"
 #include "core/level.hpp"
 #include "node.hpp"
 #include "assets/asset_db.hpp"
@@ -21,6 +22,7 @@ private:
     SDL_Renderer *render{nullptr}; //!< primary application window's renderer
     SDL_Texture *render_target{nullptr};
     AssetDB assets{};
+    CollisionWorld physics_world{};
     InputMap input_map{}; //!< map of inputs to input callback objects
     std::unique_ptr<Level> level;
     Uint64 last_frame_start_time{}; //!< time at start of last frame