Added an option to plug multiple database drivers to SQLite event store (yes, also Cloudflare D1)

[oskardudycz]

This is the first version that allows running both sqlite3 and Cloudflare D1 event store. (At least on Miniflare).

After this PR, it'll be needed to add drivers to the event store config, e.g.:

For sqlite3:

import { getSQLiteEventStore } from '@event-driven-io/emmett-sqlite';
import { sqlite3EventStoreDriver} from '@event-driven-io/emmett-sqlite/sqlite3';

const eventStore = getSQLiteEventStore({
      driver: sqlite3EventStoreDriver,
      fileName,
});

For Cloudflare D1

import { getSQLiteEventStore } from '@event-driven-io/emmett-sqlite';
import { d1EventStoreDriver} from '@event-driven-io/emmett-sqlite/cloudflare';

const eventStore = getSQLiteEventStore({
      driver: d1EventStoreDriver,
      database,
});

Also, in this PR, I implemented batching for SQLite appends to make it work also for Cloudflare D1.

There'll be follow-up PRs adjusting consumers and processors to base code according to PostgreSQL. Also extending drivers to have better DX and not take flattened Dumbo pool options. And adding Pongo support of course.

@SamHatoum @LuccaHellriegel @davecosec FYI.