feat: allow custom kind icon color in get_kind_icon

[krovuxdev]

No description provided.

[Saghen]

This was set to the block in #544 to make the color more visible. The Color key in kind_icons is set by default, so we would never use the block icon with this code as far as I can tell. Perhaps we could use a unique key for this like ColorPreview (feel free to change this, just an idea)

[Saghen]

Although, I'm also debating if we should instead provide a recipe for this and avoid adding a non-standard kind: #544 (comment)

[krovuxdev]

@Saghen Thank you for the feedback. If I understand correctly, you’re suggesting that:

• The Color key is already set by default, so it doesn’t need to be reused.
• We could consider using a unique key like ColorPreview.

Is that correct?

I’ve updated the code to use a unique key ColorPreview instead of Color.

Please let me know if this approach works for you or if you have any additional suggestions. Thank you for the detailed feedback.