Vulkan - Resource base types

[Syncaidius]

Implement all of the resource base types required for implementing more specialized types:

• [x] PipelineObject - Base class for all other GPU object/resources
• [x] PipelineShaderStage - Base class for all shader stages - Likely aligns well with Vulkan's own pipeline shader stage system
• [x] TextureBase - Required for 1D, 2D, 3D, cube and render-surface textures
• [x] GraphicsBuffer - Required for uniform/constant buffers, command buffers, vertex/index buffers and structured buffers