Overriding global pagination naming strategy from docs is not working

[rafalolszewski94]

Package version

21.6.0

Describe the bug

Examples from Lucid docs are misleading, saying that you can globally modify paginator meta keys

https://lucid.adonisjs.com/docs/pagination#serializing-to-json
https://lucid.adonisjs.com/docs/model-naming-strategy#paginationmetakeys

Registering custom service provider with code:

import db from '@adonisjs/lucid/services/db'
import type { ApplicationService } from '@adonisjs/core/types'

export default class AppProvider {
  constructor(protected app: ApplicationService) {}

  async ready() {
    db.SimplePaginator.namingStrategy = {
      paginationMetaKeys() {
        return {
          // ... same as above
        }
      },
    }
  }
}

Throws immediate TS error, saying that SimplePaginator does not exist on db.

Relates to #1046

Lucid version: 21.6.0
Core version: 6.17.1

Reproduction repo

No response