* gen ack proto type
* remove transfer ack
* change ics20 ack to use standard type
* update commented tests
* small typo fix
* revert back to module cdc
* update docs
* fix lint
* nit
* update ack event emission
* Update x/ibc-transfer/spec/01_concepts.md
* add comment for onacknowledgement
* Update proto/ibc/channel/channel.proto
Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>
Co-authored-by: Christopher Goes <cwgoes@pluranimity.org>