feat: add IApplicationPublisher

chore: release v5.0.0

docs: add some v5 docs

fix: subscribe mqtt client only after consumer started and channels a…

…re ready (race condition prevention)

fix: ensure MQTT client subscription on reconnect

fix: disable endpoint caching for mqtt wildcard subscriptions

fix: ensure timeout is reset when adding to batch

fix: improve mqtt shared subscription handling in mock

fix: properly handle UTC kafka timestamp

chore: release v5.0.0-beta.10