[CT-926] dbt parse works in click

[iknox-fa]

No description provided.

[jtcohen6]

I know there's been some discussion about the utility of "parse" as a standalone command/task, given that it's really more like an implicit initialization step for other commands/tasks.

There's still utility in having this as a separate command, especially for analyzing parsing performance.

I can also imagine using it as a first-class way to return & programmatically inspect the manifest. I opened that proposal as a new issue: #6547

[iknox-fa]

Per @stu-k this work will be handled by the manifest loading work (#6357)
Closing ticket