test: revive test module and working acceptance dev test

[jchappelow]

This revives and updates the test module.
The TestLocalDevSetup test in test/acceptance is working but not yet any of the actual acceptance tests.
I will continue with that, but I need to switch to updating type Block to using the structured transactions as it still had Txns [][]byte.

This PR also evolves app/setup functions to support act test's need for something like setup init. This will continue to change.

Finally, this changes the default root directory back to .kwild, which was temporarily .kwil2 in the early stages of node v2 to avoid clashes with existing data for previous release work.

Integration tests are mostly updated (a go build ./... in the test module works), but there is more work to be done there.