feat(sdk): pivot table color customizations (#43201)

* feat(sdk): colors for pivot tables

* fix theme type

* feat(sdk): basic pivot table theming

* fix emphasis hover color

* customizable row toggle color

* add storybook story and refactor hover color logic

* add sdk visualization wrapper

* make theme values with defaults internally non-optional but externally optional

* update test to render with providers

* update test wrapper to have height container

* update pivot table loki reference image

* update theme names

* make all theme options optional in the public config

* update readme

* readme update for consistency