DirectX (and presumably Vulkan) error translation

[ccummingsNV]

Currently if slang gfx reports an error straight from direct x, it comes through as the classic 'gfx error -212312312' report. It'd be great to catch these and translate to english.

I believe the example I hit was an incorrectly named semantic:

            input_elements.append({
                "semantic_name": "POSITIONBLA",
                "semantic_index": 0,
...
            })