Introducing of Cubemap

[JeanPhilippeKernel]

This PR introduces the support for Cubemap for environment mapping.

It provides support for:

• Bitmap creation
• Conversion from Equirectangular to Vertical Cross Image
• Conversion from Vertical Cross to Cubemap Image
• Added Cubemap shaders
• Updated Texture2D to load Cubemap
• Added Cubemap Pass to SceneRenderer

It comes with additional fixes:

• Rewrote imgui renderer and introduced UI pass
• Rewrote Command buffer generation from command pool
• Extended Pipeline specification to support Vertex input specification,
• Extended Shader specification to support overload MaxSet
• Extended Render Pass to support Swapchain image as Render target
• Fixed Vertex Buffer and Index Buffer conditional memory creation
• Rewrote the flushing process of dirty resources
• Added inline to secure memory function operations