[FEATURE]: D1 generated columns support

D1's support for [generated columns](https://developers.cloudflare.com/d1/reference/generated-columns/) allows you to create dynamic columns that are generated based on the values of other columns, including extracted or calculated values of JSON data.

These columns can be queried like any other column, and can have [indexes](https://developers.cloudflare.com/d1/best-practices/use-indexes/) defined on them. If you have JSON data that you frequently query and filter over, creating a generated column and an index can dramatically improve query performance.

It would be nice if we could have a way to define this via JS => `sqliteTable`