Update reproduction data repository name and documentation

Simplify subset descriptions and keep one download example

Rename subsets and folders to lcs-1k, lcs-10k, and imagenet-200k

Simplify README paths and link experiment instructions to GitHub

Document MLLM benchmark data and baseline dataset paths

Complete LCS-10000 release after full file and SHA-256 verification

Document LCS-10000 raw patch blocks and paired last-token features

Complete feature dataset release after file and SHA-256 verification

Document paired visual/text and ImageNet encoder feature datasets