Schema manipulation support

[Pekka Enberg]

Let's add support for CREATE TABLE, DROP TABLE, ALTER TABLE, and others.

I think for schema manipulation, we should go the extra mile and support libSQL's ALTER COLUMN extension too: https://github.com/tursodatabase/libsql/blob/main/libsql-sqlite3/doc/libsql_extensions.md#altering-columns

[Jagdish Parihar]

can I work on this issue? @penberg

[Pekka Enberg]

Go for it @jatin510!