Vertical color legend

[jamesscottbrown]

What does this change?

This adds a vertical veriant of the color legend, which is useful when there a many categories to be labelled,

Is it complete?

• [x] Have you included changeset file?
• [x] If this adds a new component, is it exported via index.js?

[jamesscottbrown]

Preview: https://dev.ldn-gis.co.uk/storybook-vertical-color-legend/?path=/docs/ui-legends-colorlegendordinalchips--documentation