docs: add CHANGELOG v0.1.0

docs: add README and LICENSE

feat: support running multiple instances

refactor: simplify structure. Remove ConsumerGroup and make Consumer a simple behaviour

feat: RecordConsumer, a consumer for easily reading record changes from the firehose

feat: add ConsumerGroup and dispatching via consumers

refactor: rewrite socket using gen_statem and gun

feat: validate message sequence

feat: initial proof of concept