Better typing

[MoSattler]

Payload has recently improved its typing considerably, and that made me choose payload for a bigger project I have. Really great work on that one!

I do think there is still room for improvement though.
Right now, things like the access handler are very generically typed with CollectionConfig. Hence no information about the actual collection is in the type. That leads to things like access not being typed correctly.

{
  slug: "users",
  access: {
    // `data` is `any`
    read: ( data }) => {/* code */},
  },
  fields: [],
}

I am not very familiar with the payload internals, but it should be possible to type CollectionConfig with generics, so that data in the example above is inferred.

[MoSattler]

Related to this #2094