Everything the host relies on was documented only in src/lotus comments.
Add a table of the 22 io.lotus.* actions (generated from lotusActions.ts,
with direction, payload and whether cinny handles each), the URL flags,
fork-only behaviour and the release/publish steps.
Fixes#43
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5
