Add documentation of full table instance variables including state for each hook

[CaitlinWeb-st]

version: 7.5.0

While working on some "advanced" functionality for tables that use react-table and looking at the documentation it isn't obvious that you can manipulate the state for the hooks. (Maybe this isn't the case with all of them.)

Specifically for useSortBy, the Instance Properties are described in documentation as only these things:

• rows
• preSortedRows
• toggleSortBy

There's no mention of:

• setSortBy
• state: { sortBy }

My use-case involved saving the sort options to localStorage, so I wanted to be able to use or set the sort's state (within a useEffect). It wasn't obvious that was possible until I looked through everything returned by useTable.

Could the documentation be updated with the additional instance variables that useTable includes with each of the hooks?

[gargroh]

Feel free to PR for the same :)