chore(ui): exports parseSearchParams

[jacobsfletch]

As pointed out in #10164, parsing a where query from search params is not exactly straightforward. Internally we rely on the qs module for this, but it comes with a couple small nuances that are undocumented, like the need to stringify them and specify depth. To standardize this, we use a parseSearchParams utility internally that accepts the URLSearchParams object that the useSearchParams() hook returns from next/navigation. This PR exports that function for reuse and adds JSDocs accordingly. Usage looks something like this:

'use client'
import { useSearchParams } from 'next/navigation'
import { parseSearchParams } from '@payloadcms/ui'

function MyComponent() {
  const searchParams = useSearchParams()
  const parsedSearchParams = parseSearchParams(searchParams)
}

[github-actions]

🚀 This is included in version v3.12.0