add CPU bold in header, update short_description

pre-publish: fix allow_tags, sync defaults, rename step functions, fix docstring

add PathToFile in placeholder format hint

rotating placeholder: format hint + example, 4s cycle

support repo:branch[:slice] convention, fix parse order

support HF URLs, branches, blob paths for dataset loading

deslop: timeout + cancel checks in FTPO training and generation

default HF ID Luminia/llm-trainer, loads bundled dataset, combined log, deslop timeout check

initial release: QLoRA SFT trainer + deslop + Horizon theme