docs: restore standard SparkLab FTW model card for NVIDIA Qwen3.8

Replace Inferact FTW with pinned NVIDIA NVFP4 + FP8 MTP/PLE checkpoint

Document self-contained MTP support

Add native MTP sidecar

Fix SparkLab name and source links

docs: simplify SparkLab model card

docs: add SparkLab FTW model card

Add files using upload-large-folder tool

Add files using upload-large-folder tool

initial commit