[FEATURE] Creating a database

[Andrew15-5]

Is your feature request related to a problem? Please describe.

When using psql I can just connect to the REPL and create or show a database catalog. Then I can just directly connect to the desired database and then work with it from there. With dblab I can't do that, which hits hard on the initial db development stage or when you're just learning or messing around with DBMS.

Describe the solution you'd like

Make "Database" field optional and on the next screen you can (select an existing database or) create a new one. This will be hard to make right, but ideally there should be fields for database name, list of database columns' name and file type. In addition, there could be toggles for each column (null, unique, etc.)

But for the first iteration, just a single prompt with an SQL query that will be sent as-is is good enough.

Describe alternatives you've considered

Going back to psql?

Additional context

Perhaps the UI or just the toggles will change depending on the DBMS.