feat: replace qs with qs-esm (#6966)

qs-esm is a qs fork I created and doesn't add bloated polyfills, is
ESM-only, has a smaller bundle size and comes with types included.

qs:
https://bundlephobia.com/package/qs@6.12.1 (11kb)
https://npm.anvaka.com/#/view/2d/qs (15 dependencies)

qs-esm:
https://bundlephobia.com/package/qs-esm@7.0.0 (4.2kb)
https://npm.anvaka.com/#/view/2d/qs-esm (1 dependency)

I don't agree with the backwards philosophy of qs:
https://github.com/ljharb/qs/issues/404#issuecomment-806392831 ("more
deps is better", lower bundle size as opt-in, maximum environment
compatibility as opt-out)

qs imports waaay too many useless dependencies

packages/next/src/utilities/initPage/index.ts

@@ -5,7 +5,7 @@ import { initI18n } from '@payloadcms/translations'
 import { findLocaleFromCode } from '@payloadcms/ui/shared'
 import { headers as getHeaders } from 'next/headers.js'
 import { createLocalReq, isEntityHidden, parseCookies } from 'payload'
-import qs from 'qs'
+import * as qs from 'qs-esm'
 
 import type { Args } from './types.js'