weir v0.0.32

Added

• prompt — interactive input as a builtin. prompt "msg?" writes
  the message to stderr (piped stdout stays data) and reads one line
  from stdin; EOF refuses rather than inventing phantom input. And
  Self.stdin now states its law: it is a live stream read ONCE — a
  second enumeration used to silently yield empty and now raises,
  naming both repairs (bind one enumeration, or prompt per
  interaction).

Changed

• weir fmt puts district markers on the binding line. Canonical
  layout is let x = <<< / let p = yaml patch by=name — never the
  marker alone on a continuation line. Both spellings still parse and
  run identically (district content is relative to its first line, so
  the rewrite is lossless); fmt now merges the next-line spelling up,
  outdenting a district-pipe close (|> f) with the marker, and
  fmt --check flags it. A binding line with a trailing comment keeps
  the next-line spelling.