feat: session-exists? client helper main

feat: stdin helper

fix: error instead of hanging when sending on a closed connection fix: reject non-canonical bencode integers and string lengths feat: conform interrupt statuses and answer jobs queued at close

fix: version number

feat: decouple sessions from connections

feat: expand client functionality

fix: describe version

doc: add demo gif

fix: lookup preview

- fix: use - fix: lookups - fix: line numbers

fix: reporting version

feat: need-input/stdin support