Rename pagination input

[buddhikasranasinghe]

In the pagination directive, to define how many rows should be displayed per page, we need to pass a value via the 'first' parameter. This parameter name doesn't actually convey its intended meaning. I suggest that 'limit' or 'take' would be better alternatives.

type Query {
  posts(
    "Limits number of fetched items."
    first: Int!  # limit or take instead of first 

    "The offset from which items are returned."
    page: Int
  ): PostPaginator
}

[DrPowerSlam]

It just reflects the GraphQL documentation, which suggests a more cursor-like approach: https://graphql.org/learn/pagination/