Adding suport for AUTOINCREMENT keyword from SQLite

[andreRaposo91]

When creating a table in SQLite, the AUTOINCREMENT keyword can be used as a column constraint when it is the primary key.

In the current implementation, this keyword does not exist, as the MySQL implementation uses AUTO_INCREMENT, with an underscore.

I'm new to Treesitter but I think it comes down to adding a new keyword in line 154

keyword_autoincrement: _ => make_keyword("autoincrement"),

and replacing line 2717 with a choice for the keywords in the _column_constraint function

choice($.keyword_auto_increment, $.keyword_autoincrement),

[DerekStride]

It's also possible to update the existing keyword_autoincrement to be a choice between the two options:

keyword_autoincrement: _ => choice(make_keyword("autoincrement"), make_keyword("autoincrement")),