[DOCS]: `import { Pool } from 'pg'` is a wrong statement, you should not use it in the docs

### Enhancement hasn't been filed before.

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### Describe the enhancement you want to request

Your docs use the statement `import { Pool } from 'pg'`

https://orm.drizzle.team/docs/get-started-postgresql#step-2---initialize-the-driver-and-make-a-query

It is wrong. `node-postgres` does not support esm import. The author has confirmed that.

https://github.com/brianc/node-postgres/pull/3191

```
import { Pool } from 'pg'
^^^^
SyntaxError: Named export 'Pool' not found. The requested module 'pg' is a CommonJS module, which may not support all module.exports as named exports.
CommonJS modules can always be imported via the default export, for example using:

import pkg from 'pg';
const { Pool } = pkg;
```