Demo with controlled hightable

[severo]

Demo for hyparam/hightable#22

Note the message in the console, which is created in the custom reducer at https://github.com/hyparam/hyperparam-cli/pull/139/files#diff-a99654565c6e7fb9f0830b7fe84c929b02e39e8fe79f0c3522fcd3362334564aR12

Screencast.From.2025-01-09.15-09-59.webm

[severo]

Update:

• showcase both HighTable and ControlledHighTable, after the last change in Publish two components: HighTable and ControlledHighTable hightable#22 (comment)
• for HighTable, show how we can use onSelectionChange
• for ControlledHighTable, show how we can use selectionAndAnchor and setSelectionAndAnchor

Screencast.From.2025-01-11.00-51-24.webm