[BUG ]: Docs - `migrate.ts` missing from the sample project file structure

### What version of `drizzle-orm` are you using?

n/a

### What version of `drizzle-kit` are you using?

n/a

### Describe the Bug

From [Basic File Structure](https://orm.drizzle.team/learn/tutorials/drizzle-with-neon#basic-file-structure), it is mentioned that

> In the `src/db` directory, we have database-related files including connection in `db.ts`, schema definitions in `schema.ts`, and a migration script in `migrate.ts` file which is responsible for applying migrations that stored in the migrations directory.

However, `migrate.ts` is missing from the file structure directly below the above description. (Additionally, there is also no `db` directory reflected in the file structure).


### Expected behavior

`migrate.ts` should be under `src/`

### Environment & setup

n/a