Add the `visibleRows` table context option and property to limit the number of rendered rows

[webJose]

Motivation

Having the table switch to a list definitely improves readability, but might be at the expense of having a very long vertical scroll.

Proposal

Let the table be configurable with an initial count of visible rows, and let that become a reactive property of the table context:

export type TableContextOptions {
  ...,
  visibleRows: number | null;
};

With this in place, developers using mdsvex-table can create a user interface, perhaps } à la sticky toolbar with buttons to show more, show all and collapse rows.