Resolved Destruction causing Validation failures with the semephores, fences and command buffers.

src/main.cpp

@@ -614,6 +614,9 @@ public:
             throw "Unknown Exception, throwing...";
         }
     }
+    ~VulkanExampleApplication() {
+        this->vk_gpu->waitIdle();
+    }
     void RecordDynamic(const vk::raii::CommandBuffer& command_buffer) const {
         const vk::Viewport viewport {
             .x = 0.0f,