New db config.edn don't include any of the file graph keys or comments.
Previously all comments were confusingly left lying around.
Also moved conversion of imported config.edn so that CLI can use it.
Also temporarily moved one dep to
https://github.com/nextjournal/nbb-test-runner/pull/2 until the PR is
merged
so it can be used outside Electron e.g. when creating graphs from CLI.
Put a symlink in the old templates/config.edn location to make new
location easier to find but it's not needed for anything to work
