After grim+slurp, satty (preferred) or swappy freezes the captured
frame for arrows/text/rect. New `breadshot annotate` / --annotate
and bread.command.shot.annotate. Missing tools warn and fall back
to the existing capture path. listen still honors region.
Pin bread-utils to bread-ecosystem v0.7.2. breadshot listen
subscribes to bread.command.shot.**, runs the same region capture
as the CLI (clipboard-only), and emits bread.shot.region.done /
.failed.
Emit bread.shot.captured after a successful grim/wl-copy capture.
Fail-silent when breadd is down. No command verbs — breadshot is a
one-shot CLI; Lua workflows should bread.exec("breadshot …").
