Add generator option for newlines between statements

[Stefan-Puskarica]

Currently the generator only generates one newline between statements which leads to code like this:

CREATE TABLE [MyTable] (
  ...
);
ALTER TABLE [MyTable]
  ...;

Which can be unfavourable, I've added a script generator option that allows you to specify how many newlines you want so you can get something like this instead:

CREATE TABLE [MyTable] (
  ...
);

ALTER TABLE [MyTable]
  ...;