[FEATURE]: Make SQLitePreparedQuery produce a then() and real promise

### Feature hasn't been suggested before.

- [x] I have verified this feature I'm about to request hasn't been suggested before.

### Describe the enhancement you want to request

Got this error
```javascript
Property 'then' does not exist on type 'SQLitePreparedQuery'.ts(2339)
```
the `.execute()` call needs to await.

Not sure if the new release has made it non-blocking or changed it, but please allow parallel fetching

versions used
```javascript
"@libsql/client": "0.5.3",
"drizzle-orm": "^0.30.10",
"drizzle-kit": "^0.21.4"
```