Say you opened
`http://localhost:3000/admin/collections/posts/67786e917283ec71ce4ab058?branch=main`,
the `branch=main` query param would not be passed to the find operation.
This means that reading `req.query` in, say, an `afterRead` hook, you
would get an empty object back.
This PR threads through `query`, `search` and `searchParams` with the
main goal of making them accessible in hooks.
## Use-case
Custom branch selector component in a collection's edit view.
Select branch => `branch` query param is added to the URL.
Collection `afterRead` hook then fetches the respective content from
that branch (which it gets from `req.query`) and returns its data
4a15b866e0