fix(kuma-gui/x-prompt): unsupported KPrompt prop type

[schogges]

The current version of kongponents dropped the support of the prop type on the KPrompt component. On the XPrompt component we want to continue to abstract away the new props that allow more granular control about the appearance and therefore make it easier to use. Instead of hardcoding :action-button-appearance="danger" or ="props.type" I thought it's better to keep this separated, so whenever we need to add another option for type (that is probably not available in kongponents), this should still work as :action-button-appearance has to be aligned with the options of KButton.appearance. For now the fallback to everything but danger is primary.

Closes #3178

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