feat: Emit event on table selection

[marek-mihok]

Let's welcome the new member to our family of already supported table events, the select event!

The select event is emitted every time when there is a change in current table rows selection and contains the list of all selected item names. Here is an example:

Screen.Recording.2023-01-26.at.09.37.28.mov

This change also comes with the updated API description:

export interface Table {
  /** An identifying name for this component. */
  name: Id
  /** The columns in this table. */
  columns: TableColumn[]
  /** The rows in this table. Mutually exclusive with `groups` attr. */
  rows?: TableRow[]
  /** True to allow multiple rows to be selected. */
  multiple?: B
  /** True to allow group by feature. Not applicable when `pagination` is set. */
  groupable?: B
  /** Indicates whether the table rows can be downloaded as a CSV file. Defaults to False. */
  downloadable?: B
  /** Indicates whether a Reset button should be displayed to reset search / filter / group-by values to their defaults. Defaults to False. */
  resettable?: B
  /** The height of the table, e.g. '400px', '50%', etc. */
  height?: S
  /** The width of the table, e.g. '100px'. Defaults to '100%'. */
  width?: S
  /** The names of the selected rows. If this parameter is set, multiple selections will be allowed (`multiple` is assumed to be `True`). */
  values?: S[]
  /** Controls visibility of table rows when `multiple` is set to `True`. Defaults to 'on-hover'. */
  checkbox_visibility?: 'always' | 'on-hover' | 'hidden'
  /** True if the component should be visible. Defaults to True. */
  visible?: B
  /** An optional tooltip message displayed when a user clicks the help icon to the right of the component. */
  tooltip?: S
  /** Creates collapsible / expandable groups of data rows. Mutually exclusive with `rows` attr. */
  groups?: TableGroup[]
  /** Display a pagination control at the bottom of the table. Set this value using `ui.table_pagination()`. */
  pagination?: TablePagination
  /** The events to capture on this table. One of 'search' | 'sort' | 'filter' | 'download' | 'page_change' | 'reset' | 'select'. */
  events?: S[]
}

Closes #1654

[mturoci]

Thanks @marek-mihok! A few changes needed.

[mturoci]

LGTM.