fixed several memory leaks caused by not including virtual destructors, added a config for the visualizer, next up is lua

src/engine/rendering/sdl/sdlrenderer.cpp

@@ -55,6 +55,10 @@ void SdlRenderer::draw_text(std::optional<TextRenderDetails> details, std::strin
 }
 
 SdlRenderer::~SdlRenderer() {
+    // clear resource managers pointing to shared pointers
+    // This avoids an invalid read, since otherwise TTF_Quit will cleanup fonts and then clearing the shared pointers will try it again
+    font_manager->clear_all_resources();
+    texture_manager->clear_all_resources();
     // exit subsystems
     IMG_Quit();
     TTF_Quit();