- to test handling the exposed APIs when dealing with sorted/paginated data

- to test type issues during consumer usage

+ @ts-ignore faker complaints

…leRowIndex`s

- this will let us set up ref-specific helpers & add more comment context without bloating the main file

- Converts the `rowIndex` from the consumer to a `visibleRowIndex` that our internal state can use

- Account for sorted grid by finding the inversed index of the `sortedRowMap`
- To make this easier, I converted soredRowMap to an array (since it's already only uses numbers for both keys and values), since arrays have a handy .findIndex method

- Handles automatically paginating the grid if the targeted cell is on a different page

- having a side effect in a getter feels bad, so change that to a `find`
- rename use hook to indicate sorting and pagination concerns