The new top-level structure has several advantages compared to the
action-based structure it replaces:
1. It's easier to see what commands are supported just from glancing
over at the commands template.
2. There is less duplication in the commands definition, so it should be
much easier to add additional commands, and settings.
3. Overall behaviour becomes less statefull. It's annoying to do /stop
in the middle of the practive to look up some word from the usage
examples.

Using DB instead of loading content of csv files into the memory would
reduce server's memory usage greatly.

Image size is reduced more than 10x which makes it easier to deploy new
images faster.
On the server with 2GB RAM Memory usage dropped from 73% to 13% after
the new image was deployed.

Makes building images slightly faster.

This is mostly for convenience.