Table Chart: Support Expandable JSON Cell Viewing

[bennylinservicenow]

When viewing JSON data in a table chart, it would be helpful to have the ability to expand or collapse JSON cells inline. This is especially valuable for large or deeply nested JSON structures where the raw string is difficult to parse at a glance.

An alternative approach would be a clickable modal to inspect the full JSON — similar to the functionality already available in SQLLab. Bringing this to the chart table would make for a more consistent and accessible experience across the product.

[rusackas]

I'm game for it. You can look at the cell renderers, AG Grid lets you add custom ones.
https://www.ag-grid.com/javascript-data-grid/component-cell-renderer/