Either always force psql drop or allow force as option

[Andsbf]

Context:

The reason behind it is to improve developer experience, as right now when running a command like hanami db reset it will fail if the user has any other ongoing connection, like a connection to db client(like dbeaver), or a hanami console session.

Couple other possible approaches are:

              # create a dedicated method for force drop
              def force_drop_command
                system(cli_env_vars, "dropdb --force #{escaped_name}")
              end

              # force as option/param
              def drop_command(force=false)
              command_prefix =  force ? "dropdb --force" : "dropdb"
              
                system(cli_env_vars, "#{command_prefix} #{escaped_name}")
              end

Reference:
https://www.postgresql.org/docs/current/sql-dropdatabase.html#id-1.9.3.108.6

PR with proposal:
#81