Banner component update

[mkrause]

This PR:

• Reworks and expands on the Banner component.
• Removes the Alert component, which is a duplication.
• Adds new "filled" variants of the success/error/info icons, for use in Banner.

It also:

• Fixes an issue with Storybook controls no longer working, a regression that happened with the splitting of tsconfig.json files.
• Fixes some issues in the SegmentedControl and Tooltip components (which I needed for Banner).

TODO:

• Need to get the right icons, the Figma has some icons that are not in the icon pack (e.g. filled success/error icons).

[mkrause]

This apparently caused a regression in Chrome v121, which is the version used on Chromatic at the moment:

I cannot reproduce this issue in any current browser, and just from the screenshots I have not been able to deduce the cause of this issue. It's not as simple as the icon being too large, it seems that the icon takes up the full width of the icon + title element, all the while the title text is hidden/collapsed. So the icon actually scales with the title text for some weird reason.

So this would need some investigation on an actual Chrome v121 instance. On the other hand, Chrome v121 was released in January 2024, so it's a year old by now and maybe we can ignore this as an old browser bug? Chromatic will update to a newer Chrome version in February 2025.