- Add Camera ECS component with view/projection matrices.
- Add Vulkan depth buffer to Swapchain: image, memory, view, render pass, framebuffers.
- Update VulkanPipeline with depth stencil testing and push-constant layout.
- Update vertex shader to use push-constant MVP matrix.
- MeshRenderer finds Camera, computes MVP per entity and pushes it.
- Program.cs creates a camera entity and keeps the cube rotating.
Build and run verified: window opens and FPS is reported.
emil28092005