script/fmt and script/fmt-check now run prettier over all Markdown
after the Go step. The prettier config, package.json, yarn.lock and the
node and yarn steps of script/bootstrap are copied from sneak/prompts
with the same pinned versions.
script/bootstrap also installs curl when missing: script/install-go
needs it, so a host with only docker and git stopped there.
Model: opus-5-5
