feat!: Replace renamed colours for Avatar, Badge and Spotlight

[VincentSmedinga]

Describe the pull request

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What

This updates some changed colour names as options for the color prop of Avatar, Badge and Spotlight.

Why

To reflect the changes in underlying colour names.

How

Find, replace, sort, test.

I’ve committed the renames separately from the sorting – reviewing the renaming commits separately may be more insightful than checking the full diff.

Additional notes

1. We may not need all four neutral shades for Avatar and Badge. Let’s address this separately – this PR only does renaming.
2. If we do want to keep them, the neutral-xx names may not be the best API. Should we find colour names that match the others here? This could be done in this PR, as it is just a different rename.
3. Blue may not be the best default value for Spotlight, as we only want the Footer to be such a blue area.
4. Blue may not be the best default value for Avatar, until it can be made interactive.