feat: add complete project documentation and LICENSE

feat: remove Bot Open ID requirement, use im:message.group_at_msg:readonly

chore(deploy): add start script and example env for deployment

docs: split README into English and Chinese versions

feat(gate,broker,recovery): bot mention, broker PLAN_READY wiring, restart recovery

fix(runtime): wire all modules in production entrypoint

test(e2e): add end-to-end workflow and recovery tests

feat(bridge): complete Tasks 6-10 (FSM, broker, rendering, card, mirror)

feat(state): add per-group session and idempotency control

feat(auth): enforce allowlist and mention gating

feat(feishu): verify and normalize inbound events

feat(domain): define bridge contracts and workflow schema

chore(bridge): scaffold service foundation and tests