v0.5.0

Additional sinks (#231)

* mysql sink checkpoint

* use gorm for postgres too

* checkpoint

* get direct materialize sink working

* docs and spin up devel destinations faster

* Adds ability to create multiple db-based sinks

* starts clickhouse sink, taking a break

* Get clickhouse running alongside other sinks

* ff minor since so much functionality

* better defaults, quickstart devel, etc

* bump compose

* devel tracker domain

* clean up setup for now

* Adds mongo and mongo-express to devel env

* toss kowl and kafka and whatnot into the party