export to CSV

[exalate-issue-sync[bot]]

What is the feature request? What problem does it solve? Often users would need to export result of some query to CSV file so they can send it to a colleague or to analyze it with other excel files they already have or to import it somewhere else. This is so frequent that a lot of tools have an option to export to csv (it's standard feature of any SQL client for example).

Suggested solution We'd like to have generic command in vdk called vdk export-csv which can export from the default database to a local file.

We can extend vdk-csv by adding that command alongside existing ingest-csv.