feat(Table): example for initial state

[elephantcatdog]

Someone asked me how to have pre-selected rows in a table. Based on that and on Vykintas' suggestion to add more table examples, I added this example on how to set an initial state for the table.

Closes #

Checklist

• [ ] ~Add meaningful unit tests for your component (verify that all lines are covered)~
• [x] Verify that all existing tests pass
• [x] Add component features demo in Storybook (different stories)
• [x] Approve test images for new stories
• [x] Add screenshots of the key elements of the component

[elephantcatdog]

I will merge when main and v1 have been merged into v2