Hyper docs

agent: present tool rejections without failures by @kanyesthaker in #322
email: let people refuse announcements, and send each one once by @shalins in #315
release: mail a hand-written announcement on every stable minor by @shalins in #298
connectors: search native interfaces by @kanyesthaker in #326
connectors: execute native reads by @kanyesthaker in #327
connectors: execute graphql reads by @kanyesthaker in #328