feat req: db console / client log tab (postgresql)

[blurayne]

Very cool and useful project! BUT i really miss a DB Console Window since our DB has a lot of function with many useful debug messages.

The "Messages" tab in DBGate simple doesn't output the following which every PostgrSQL CLI client does (psql or usql):

SET client_min_messages TO NOTICE;

create procedure raise_notice (s text) language plpgsql as 
$$
begin 
    raise notice '%', s;
end;
$$;

call raise_notice('where can you see me?');

Example:

This should not be part of the messages window but better could fit into a DB Log / DB Console window since we have different log levels.

Check https://www.postgresql.org/docs/current/runtime-config-client.html