bootstrap

Walk the user through executing the livespec bootstrap plan one sub-step at a time, with confirmation gates at every step and persistent state across sessions. Pass `--ff` to fast-forward through the current phase without per-sub-step gates (still halts on blocking drift and at phase boundaries). Invoked when the user types /livespec-bootstrap:bootstrap, /bootstrap, /livespec-bootstrap:bootstrap --ff, /bootstrap --ff, asks to "start the bootstrap", "continue the bootstrap", "resume bootstrap", "fast-forward the bootstrap", or asks where they are in the bootstrap process.