docs: replace broken badge with plain releases link

docs: add release badge and latest release link to README

create .gitverse/workflows/html_js.yaml

ci: print artifact id, url and digest after upload

ci: optimize artifact upload (level 1, overwrite, 14d retention)

docs: add artifact download to README

feat: add artifact download command

fix: change --limit default to 0 (don't send param by default; API rejects unknown query params)

docs: fix outdated README (--no-color removed, pr merge --confirm, pr create syntax)

fix: address all code review issues

fix: complete cmd signature update and resolve slash-ambiguity issues

feat: auto-detect owner/repo from git remote across all commands

build: disable CGO for fully static cross-compiled binaries