Put all of the frame data in a `Frame` struct

[Paracetamol56]

Per frame data for now :

struct Frame
   {
      VkFramebuffer frameBuffer;
      std::unique_ptr<ImageDepth> depthBuffer;

      VkSemaphore imageAvailableSemaphore;
      VkSemaphore renderFinishedSemaphore;
      VkFence inFlightFence;

      std::unique_ptr<CommandBuffer> commandBuffer;
      std::unique_ptr<UniformBuffer> uniformBuffer;
      VkDescriptorSet descriptorSet;
   };