drizzle-orm-sqlite 0.14.3

RangeError: The supplied SQL string contains more than one statement error on migrations was fixed

Created .exec() method for session, that will run query without prepared statments
Fix defaultNow() method query generation by adding missin "()".

Previously default value was generated as
sql
```
cast((julianday('now') - 2440587.5)*86400000 as integer)
```
Currently default value looks like
sql
```
(cast((julianday('now') - 2440587.5)*86400000 as integer))
```
Create test cases for both issues